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 (
    82488, 91886, 91887, 92329, 92330, 92331, 
    92332, 91479, 92000, 91538, 91539, 
    90210, 90233, 91536, 91537, 90190, 
    92346, 91901, 91902, 91903, 92345, 
    92347, 92348, 90182, 90172, 85638, 
    82551, 90276, 85637, 85636, 90204, 
    90215, 85635, 90209, 90232, 85583, 
    92342, 90196, 91897, 91898, 91899, 
    92341, 92343, 92344, 88925, 88926, 
    88927, 91470
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00123

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "21.63"
    },
    "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": 48,
      "rows_produced_per_join": 48,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "16.83",
        "eval_cost": "4.80",
        "prefix_cost": "21.63",
        "data_read_per_join": "183K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (82488,91886,91887,92329,92330,92331,92332,91479,92000,91538,91539,90210,90233,91536,91537,90190,92346,91901,91902,91903,92345,92347,92348,90182,90172,85638,82551,90276,85637,85636,90204,90215,85635,90209,90232,85583,92342,90196,91897,91898,91899,92341,92343,92344,88925,88926,88927,91470)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}

Result

product_id short_description full_description
82488 nuie Pacific 700mm Side Panel - 6mm Glass - Polished Chrome
82551 Rail for D Shaped Enclosure - Polished Chrome
85583 nuie Wastes & Extras Deck Shower Kit - Chrome
85635 nuie Ella 700mm Side Panel - 5mm Glass - Satin Chrome
85636 nuie Ella 760mm Side Panel - 5mm Glass - Satin Chrome
85637 nuie Ella 800mm Side Panel - 5mm Glass - Satin Chrome
85638 nuie Ella 900mm Side Panel - 5mm Glass - Satin Chrome
88925 nuie 1850mm Profile Extension Kit - Chrome
88926 nuie 1850mm Profile Extension Kit - Matt Black
88927 Hudson Reed 1900mm Profile Extension Kit - Polished Chrome
90172 nuie Fluted Wetroom Screens 300mmx1850mm Fluted Hinged Screen Including Support Bar - Polished Chrome
90182 Hudson Reed 300 x 1950mm Fluted Hinged Screen Including bar - Polished Chrome
90190 nuie Wetroom Hinged Screen 300 x 1850mm - 8mm Glass - Polished Chrome
90196 Hudson Reed 215mm Wetroom Return Screen - 8mm Glass - Polished Chrome
90204 Hudson Reed 215mm Return Screen With Brass Profile - 8mm Glass - Brushed Brass
90209 nuie 215mm Wetroom Return Screen - 8mm Glass - Matt Black
90210 nuie 300mm Wetroom Swing Screen - 8mm Glass - Matt Black
90215 Hudson Reed 215mm Return Screen With Black Profile - 8mm Glass - Polished Chrome
90232 nuie 215mm Wetroom Return Screen - 8mm Glass - Brushed Brass
90233 nuie 300mm Wetroom Swing Screen - 8mm Glass - Brushed Brass
90276 Hudson Reed 215mm Wetroom Return Screen - 8mm Glass - Matt Black
91470 nuie Pacific Enclosure Profile Extension Kit, 1850mm - Brushed Brass
91479 nuie Rene 6mm Toughened Safety Glass Shower Side Panel, 700mm x 1850mm - Matt Black
91536 nuie Fluted Wetroom Fluted Wetroom 8mm Toughened Safety Glass Swing Return Screen, 300mm x 1850mm - Brushed Brass
91537 nuie Fluted Wetroom Fluted Wetroom 8mm Toughened Safety Glass Swing Return Screen, 300mm x 1850mm - Matt Black
91538 Hudson Reed Fluted Wetroom Fluted Wetroom 8mm Toughened Safety Glass Swing Return Screen, 300mm x 1950mm - Brushed Brass
91539 Hudson Reed Fluted Wetroom Fluted Wetroom 8mm Toughened Safety Glass Swing Return Screen, 300mm x 1950mm - Matt Black
91886 BC Designs Victrion 3 Tier Shower Tidy - Gold
91887 BC Designs Victrion 3 Tier Shower Tidy - Nickel
91897 BC Designs Victrion Corner Shower Basket - Copper
91898 BC Designs Victrion Corner Shower Basket - Gold
91899 BC Designs Victrion Corner Shower Basket - Nickel
91901 BC Designs Victrion Double Corner Shower Basket - Copper
91902 BC Designs Victrion Double Corner Shower Basket - Gold
91903 BC Designs Victrion Double Corner Shower Basket - Nickel
92000 BC Designs Victrion Arch Shower Ring 1036mm x 642mm x 374mm - Chrome
92329 BC Designs Victrion Shower Tidy - Brushed Chrome
92330 BC Designs Victrion Shower Tidy - Brushed Copper
92331 BC Designs Victrion Shower Tidy - Brushed Gold
92332 BC Designs Victrion Shower Tidy - Brushed Nickel
92341 BC Designs Victrion Corner Shower Basket - Brushed Chrome
92342 BC Designs Victrion Corner Shower Basket - Brushed Copper
92343 BC Designs Victrion Corner Shower Basket - Brushed Gold
92344 BC Designs Victrion Corner Shower Basket - Brushed Nickel
92345 BC Designs Victrion Double Corner Shower Basket - Brushed Chrome
92346 BC Designs Victrion Double Corner Shower Basket - Brushed Copper
92347 BC Designs Victrion Double Corner Shower Basket - Brushed Gold
92348 BC Designs Victrion Double Corner Shower Basket - Brushed Nickel