SELECT 
  cscart_product_descriptions.product_id, 
  cscart_product_descriptions.short_description, 
  IF(
    cscart_product_descriptions.short_description = '' 
    OR cscart_product_descriptions.short_description IS NULL, 
    cscart_product_descriptions.full_description, 
    ''
  ) AS full_description 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    92557, 91945, 91946, 91947, 91948, 91949, 
    91950, 91951, 82371, 82450, 82451, 
    82449, 84909, 91944, 82353, 91938, 
    82352, 91937, 91939, 91940, 91941, 
    91942, 91943, 86856, 82386, 82403, 
    82410, 82424, 82385, 82362, 82448, 
    82360, 82404, 82342, 82367, 82338, 
    82337, 91978, 91981, 82361, 82563, 
    82567, 82571, 91977, 91979, 91980, 
    91982, 91983, 82556, 85583, 89595, 
    89596, 89597, 82336, 91936, 91970, 
    91973, 91985, 91986, 91987, 91988, 
    91989, 91990, 91991, 91969, 91971, 
    91972, 91974, 91975, 86810, 82557, 
    84045, 82369, 82375, 82357, 89590, 
    89589, 86806, 82560, 82565, 82569, 
    82573, 82562, 82566, 82570, 91968, 
    84289, 82555, 82553, 82391, 82554, 
    82559, 82552, 82564, 82568, 82572
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00162

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "43.24"
    },
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "product_id"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id",
        "lang_code"
      ],
      "key_length": "9",
      "rows_examined_per_scan": 96,
      "rows_produced_per_join": 96,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "33.64",
        "eval_cost": "9.60",
        "prefix_cost": "43.24",
        "data_read_per_join": "366K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (92557,91945,91946,91947,91948,91949,91950,91951,82371,82450,82451,82449,84909,91944,82353,91938,82352,91937,91939,91940,91941,91942,91943,86856,82386,82403,82410,82424,82385,82362,82448,82360,82404,82342,82367,82338,82337,91978,91981,82361,82563,82567,82571,91977,91979,91980,91982,91983,82556,85583,89595,89596,89597,82336,91936,91970,91973,91985,91986,91987,91988,91989,91990,91991,91969,91971,91972,91974,91975,86810,82557,84045,82369,82375,82357,89590,89589,86806,82560,82565,82569,82573,82562,82566,82570,91968,84289,82555,82553,82391,82554,82559,82552,82564,82568,82572)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}

Result

product_id short_description full_description
82336 nuie Shower Kits Slide Rail Kit - Chrome
82337 nuie Slimline Slide Rail Kit - Chrome
82338 Hudson Reed Slide Rail Kits Linear Slide Rail Kits - Chrome
82342 Hudson Reed Slide Rail Kits Water Saving Slide Rail Kit - Chrome
82352 Hudson Reed Multi Option Shower Kits Destiny Shower Kit - Chrome
82353 Hudson Reed Multi Option Shower Kits Worth Shower Kit - Chrome
82357 nuie Bar Showers Fast-Fit Bracket for Bar Thermostats - Chrome
82360 nuie Showers Rail Kits Slide Rail Kit - Gunmetal
82361 nuie Rigid Riser Kit - Chrome
82362 Hudson Reed Slide Rail Kits Kubix Slide Rail Kit - Chrome
82367 nuie Shower Kits Slider Rail Kit - Chrome
82369 Hudson Reed Fixed Shower Heads Ceiling-Mounted Arm - Chrome
82371 nuie Shower Kits Rigid Riser Kit - Chrome
82375 nuie Shower Kits Luxury Slide Rail Kit - Chrome
82385 Hudson Reed Shower Kits Rigid Riser Kit - Chrome / White
82386 nuie Shower Kits Rigid Riser Kit - Chrome
82391 nuie Shower Accessories Wall Bracket - Chrome
82403 nuie Shower Kits Slide Rail Kit - Matt Black
82404 Hudson Reed Slide Rail Kits Slider Rail Kit - Chrome / Black
82410 nuie Shower Kits Square Slider Rail Kit with Elbow - Gunmetal
82424 nuie Shower Kits Slide Rail Kit - Brushed Brass
82448 nuie Shower Kits Rigid Riser Kit - Chrome
82449 nuie Shower Kits Rigid Riser Kit - Chrome
82450 Hudson Reed Shower Kits Deluxe Grand Rigid Riser Kit - Chrome / White
82451 Hudson Reed Shower Kits Rigid Riser Kit - Chrome / Black
82552 nuie Shower Arms Wall-Mounted Arm - Chrome
82553 nuie Wall-Mounted Arm - Chrome
82554 nuie Shower Arms Wall-Mounted Arm - Chrome
82555 Hudson Reed Fixed Shower Heads Wall-Mounted Arm - Chrome
82556 Hudson Reed Fixed Shower Heads Wall-Mounted Arm - Chrome
82557 Hudson Reed Fixed Shower Heads Wall-Mounted Arm - Chrome
82559 nuie Shower Arms Ceiling-Mounted Arm - Chrome
82560 nuie Square Wall Mounted Shower Arm - Chrome
82562 Hudson Reed Fixed Shower Heads Wall-Mounted Arm - Matt Black
82563 nuie Fixed Shower Heads Wall-Mounted Arm - Matt Black
82564 Hudson Reed Fixed Shower Heads Wall-Mounted Arm - Matt Black
82565 Hudson Reed Fixed Shower Heads Ceiling-Mounted Arm - Matt Black
82566 nuie Fixed Shower Heads Wall Hung Shower Arm - Gunmetal
82567 nuie Fixed Shower Heads Small Rectangular Shower Arm - Gunmetal
82568 nuie Fixed Shower Heads Round Ceiling Arm 150mm - Gunmetal
82569 nuie Fixed Shower Heads Round Ceiling Arm 300mm - Gunmetal
82570 Hudson Reed Fixed Shower Heads Wall-Mounted Arm - Brushed Brass
82571 nuie Fixed Shower Heads Wall-Mounted Arm - Brushed Brass
82572 Hudson Reed Fixed Shower Heads Wall-Mounted Arm - Brushed Brass
82573 Hudson Reed Fixed Shower Heads Ceiling-Mounted Arm - Brushed Brass
84045 Hudson Reed Shower Accessories Body Jet - Chrome
84289 nuie Shower Accessories Douche Spray Kit - Chrome
84909 nuie Edwardian Twin Thermostatic Shower Valve & Rigid Riser - Chrome
85583 nuie Wastes & Extras Deck Shower Kit - Chrome
86806 nuie Shower Kits Slide Rail Kit - Chrome
86810 nuie Shower Kits Slide Rail Kit - Chrome
86856 Hudson Reed Shower Accessories Shower Seat - Chrome
89589 nuie Shower Kits Slide Rail Kit - Chrome
89590 nuie Slide Rail Kit - Chrome
89595 nuie Shower Kits Slide Rail Kit - Matt Black
89596 nuie Shower Kits Round Slider Rail Kit with Elbow - Gunmetal
89597 nuie Shower Kits Slide Rail Kit - Brushed Brass
91936 BC Designs Victrion Traditional Slide Rail Kit and Handset - Chrome
91937 BC Designs Victrion Traditional Slide Rail Kit and Handset - Brushed Chrome
91938 BC Designs Victrion Traditional Slide Rail Kit and Handset - Brushed Copper
91939 BC Designs Victrion Traditional Slide Rail Kit and Handset - Brushed Gold
91940 BC Designs Victrion Traditional Slide Rail Kit and Handset - Brushed Nickel
91941 BC Designs Victrion Traditional Slide Rail Kit and Handset - Copper
91942 BC Designs Victrion Traditional Slide Rail Kit and Handset - Gold
91943 BC Designs Victrion Traditional Slide Rail Kit and Handset - Nickel
91944 BC Designs Victrion Superbe Fixed Rigid Riser Kit with 8" Shower Head and Handset - Chrome
91945 BC Designs Victrion Superbe Fixed Rigid Riser Kit with 8" Shower Head and Handset - Brushed Chrome
91946 BC Designs Victrion Superbe Fixed Rigid Riser Kit with 8" Shower Head and Handset - Brushed Copper
91947 BC Designs Victrion Superbe Fixed Rigid Riser Kit with 8" Shower Head and Handset - Brushed Gold
91948 BC Designs Victrion Superbe Fixed Rigid Riser Kit with 8" Shower Head and Handset - Brushed Nickel
91949 BC Designs Victrion Superbe Fixed Rigid Riser Kit with 8" Shower Head and Handset - Copper
91950 BC Designs Victrion Superbe Fixed Rigid Riser Kit with 8" Shower Head and Handset - Gold
91951 BC Designs Victrion Superbe Fixed Rigid Riser Kit with 8" Shower Head and Handset - Nickel
91968 BC Designs Victrion Ceiling Mounted Shower Arm - Chrome
91969 BC Designs Victrion Ceiling Mounted Shower Arm - Brushed Chrome
91970 BC Designs Victrion Ceiling Mounted Shower Arm - Brushed Copper
91971 BC Designs Victrion Ceiling Mounted Shower Arm - Brushed Gold
91972 BC Designs Victrion Ceiling Mounted Shower Arm - Brushed Nickel
91973 BC Designs Victrion Ceiling Mounted Shower Arm - Copper
91974 BC Designs Victrion Ceiling Mounted Shower Arm - Gold
91975 BC Designs Victrion Ceiling Mounted Shower Arm - Nickel
91977 BC Designs Victrion Arch Wall Mounted Shower Arm - Brushed Chrome
91978 BC Designs Victrion Arch Wall Mounted Shower Arm - Brushed Copper
91979 BC Designs Victrion Arch Wall Mounted Shower Arm - Brushed Gold
91980 BC Designs Victrion Arch Wall Mounted Shower Arm - Brushed Nickel
91981 BC Designs Victrion Arch Wall Mounted Shower Arm - Copper
91982 BC Designs Victrion Arch Wall Mounted Shower Arm - Gold
91983 BC Designs Victrion Arch Wall Mounted Shower Arm - Nickel
91985 BC Designs Victrion Straight Wall Mounted Shower Arm - Brushed Chrome
91986 BC Designs Victrion Straight Wall Mounted Shower Arm - Brushed Copper
91987 BC Designs Victrion Straight Wall Mounted Shower Arm - Brushed Gold
91988 BC Designs Victrion Straight Wall Mounted Shower Arm - Brushed Nickel
91989 BC Designs Victrion Straight Wall Mounted Shower Arm - Copper
91990 BC Designs Victrion Straight Wall Mounted Shower Arm - Gold
91991 BC Designs Victrion Straight Wall Mounted Shower Arm - Nickel
92557