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 (
    88074, 88069, 87878, 88075, 88025, 84696, 
    88938, 87996, 84699, 88516, 88519, 
    88073, 88940, 88040, 84703, 84706, 
    88082, 91053, 88941, 87958, 88068, 
    87951, 88067, 88512, 88077, 88141, 
    88144, 88939, 87986, 87946, 87947, 
    87949, 88043, 87956, 89982, 89983, 
    89984, 88081, 84702, 84705, 91052, 
    88003, 88046, 88080, 84697, 84698, 
    88028, 88140, 88143, 88508, 87890, 
    84695, 88937, 87877, 87905, 88045, 
    88049, 87936, 88515, 88518, 88078, 
    88514, 88517, 88511, 88083, 87904, 
    90325, 87876, 88506, 88507, 88510, 
    88035, 88044, 87987, 90828, 90827, 
    87938, 87941, 87997, 88026, 87882, 
    87988, 88036, 88047, 88048, 90324, 
    90326, 88050, 88051, 88052, 88053, 
    88054, 87900, 87901, 87990, 87961
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00100

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 (88074,88069,87878,88075,88025,84696,88938,87996,84699,88516,88519,88073,88940,88040,84703,84706,88082,91053,88941,87958,88068,87951,88067,88512,88077,88141,88144,88939,87986,87946,87947,87949,88043,87956,89982,89983,89984,88081,84702,84705,91052,88003,88046,88080,84697,84698,88028,88140,88143,88508,87890,84695,88937,87877,87905,88045,88049,87936,88515,88518,88078,88514,88517,88511,88083,87904,90325,87876,88506,88507,88510,88035,88044,87987,90828,90827,87938,87941,87997,88026,87882,87988,88036,88047,88048,90324,90326,88050,88051,88052,88053,88054,87900,87901,87990,87961)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}