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 (
    87419, 87417, 82438, 87418, 82437, 87416, 
    87415, 87414, 87413, 87412, 82499, 
    91473, 82497, 91472, 82495, 91471, 
    82498, 82493, 82496, 89539, 82494, 
    89540, 82492, 89538, 92569, 92570, 
    92571, 92572, 92573, 92574, 95035, 
    95036, 95037, 95038, 95039, 95040, 
    95041, 95042, 95043, 95044, 95045, 
    95049, 95050, 95051, 95052, 95053, 
    95054, 95055, 95056, 95333, 95334, 
    95335, 95336, 95337, 95338, 95339, 
    95340, 95343, 95347, 95348, 95350, 
    95351, 95353, 95354, 95355, 95514, 
    95515, 95516, 95520, 95521, 95522, 
    95530, 95531, 95532, 95546, 95547, 
    95548, 96190, 96783, 96784, 96807, 
    96808, 96809, 96810, 96811, 96812, 
    96813, 96814, 96815, 96816, 96920, 
    96921, 96922, 96923, 96924, 96925
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00243

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 (87419,87417,82438,87418,82437,87416,87415,87414,87413,87412,82499,91473,82497,91472,82495,91471,82498,82493,82496,89539,82494,89540,82492,89538,92569,92570,92571,92572,92573,92574,95035,95036,95037,95038,95039,95040,95041,95042,95043,95044,95045,95049,95050,95051,95052,95053,95054,95055,95056,95333,95334,95335,95336,95337,95338,95339,95340,95343,95347,95348,95350,95351,95353,95354,95355,95514,95515,95516,95520,95521,95522,95530,95531,95532,95546,95547,95548,96190,96783,96784,96807,96808,96809,96810,96811,96812,96813,96814,96815,96816,96920,96921,96922,96923,96924,96925)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}