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 (
    92176, 92177, 92178, 91061, 84716, 85272, 
    85273, 88063, 84738, 92171, 84726, 
    84742, 91063, 91062, 91057, 92322, 
    92323, 92324, 83897, 83898, 83900, 
    83901, 83902, 83903, 83904, 83905, 
    83906, 84935, 88062, 91060, 91055, 
    91058, 84858, 91735, 91736, 91737, 
    91738, 91739, 91740, 91741, 91742, 
    91743, 91744, 91745, 91746, 91747, 
    91748, 91749
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00102

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 (92176,92177,92178,91061,84716,85272,85273,88063,84738,92171,84726,84742,91063,91062,91057,92322,92323,92324,83897,83898,83900,83901,83902,83903,83904,83905,83906,84935,88062,91060,91055,91058,84858,91735,91736,91737,91738,91739,91740,91741,91742,91743,91744,91745,91746,91747,91748,91749)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}

Result

product_id short_description full_description
83897 BC Designs Copper Basins Oval Countertop Basin with Copper Outer/Inner - Copper
83898 BC Designs Copper Basins Oval Countertop Basin with Antique Copper Outer/Inner - Antique Copper
83900 BC Designs Copper Basins Oval Countertop Basin with Copper Inner, Verdigris Outer - Copper/Verdigris
83901 BC Designs Copper Basins Oval Countertop Basin with Copper Inner, Patinata Outer - Copper/Patinata
83902 BC Designs Copper Basins Oval Countertop Basin with Copper Outer, Nickel Inner - Copper/Nickel
83903 BC Designs Copper Basins Oval Countertop Antique Copper Basin with Nickel Inner - Antique Copper/Nickel
83904 BC Designs Copper Basins Oval Countertop Basin with Nickel Outer/Inner - Nickel
83905 BC Designs Copper Basins Oval Countertop Basin with Brass Outer/Inner - Brass
83906 BC Designs Copper Basins Oval Countertop Basin with Tin Outer/Inner - Tin
84716 Hudson Reed Maya Flush to Wall Pan, Cistern & Seat
84726 Old London Richmond High Level Pan, Cistern & Flush Pipe Kit
84738 Old London Richmond Comfort Height High Level WC & Flush Pipe
84742 nuie Carlton High Level Pan, Cistern & Flush Pipe Kit
84858 Hudson Reed Luna Flush to Wall Pan, Cistern & Seat
84935 nuie Ambrose Compact Semi Flush to Wall WC
85272 nuie Doc M Pack Doc M Pack White - White
85273 nuie Doc M Pack Doc M Pack Blue - Blue
88062 Hudson Reed Grace Wall Hung Basin
88063 Hudson Reed Grace Rimless Wall Hung Pan & Seat
91055 Arlo W/H Pan SC Seat & Conc Cistern
91057 Ava W/H Pan SC Seat & Conc Cistern
91058 Ava W/H Pan SC Seat & Conc Cistern
91060 Freya W/H Pan SC Seat & Conc Cistern
91061 Grace W/H Pan SC Seat & Conc Cistern
91062 Luna W/H Pan SC Seat & Conc Cistern
91063 Maya W/H Pan SC Seat & Conc Cistern
91735 BC Designs Bampton Soft Square Countertop Basin 535mm x 390mm - No Waste - Polished White
91736 BC Designs Bampton Soft Square Countertop Basin 535mm x 390mm - No Waste - Powder Blue
91737 BC Designs Bampton Soft Square Countertop Basin 535mm x 390mm - No Waste - Light Fawn
91738 BC Designs Bampton Soft Square Countertop Basin 535mm x 390mm - No Waste - Gunmetal
91739 BC Designs Bampton Soft Square Countertop Basin 535mm x 390mm - No Waste - Industrial Grey
91740 BC Designs Bampton Soft Square Countertop Basin 535mm x 390mm - No Waste - Khaki Green
91741 BC Designs Bampton Soft Square Countertop Basin 535mm x 390mm - No Waste - Mushroom
91742 BC Designs Bampton Soft Square Countertop Basin 535mm x 390mm - No Waste - Powder Grey
91743 BC Designs Bampton Soft Square Countertop Basin 535mm x 390mm - No Waste - Satin Rose
91744 BC Designs Magnus Square Countertop Basin 525mm x 380mm - No Waste - Polished White
91745 BC Designs Magnus Square Countertop Basin 525mm x 380mm - No Waste - Powder Blue
91746 BC Designs Magnus Square Countertop Basin 525mm x 380mm - No Waste - Light Fawn
91747 BC Designs Magnus Square Countertop Basin 525mm x 380mm - No Waste - Gunmetal
91748 BC Designs Magnus Square Countertop Basin 525mm x 380mm - No Waste - Industrial Grey
91749 BC Designs Magnus Square Countertop Basin 525mm x 380mm - No Waste - Khaki Green
92171 BC Designs Victrion Pan, High Level Cistern & Pipe - White
92176 BC Designs Victrion 640mm Basin & Ornate Stand 1TH - White
92177 BC Designs Victrion 640mm Basin & Ornate Stand 2TH - White
92178 BC Designs Victrion 640mm Basin & Ornate Stand 3TH - White
92322 Nuie Classique 500mm 1TH Basin & Luxury Washstand
92323 Nuie Classique 500mm 0TH Basin & Luxury Washstand
92324 Nuie Classique 500mm 3TH Basin & Luxury Washstand