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 (
    94586, 94587, 94588, 95830, 95831, 95869, 
    95870, 95871, 95872, 95873, 95874, 
    95875, 95876, 95877, 95878, 95879, 
    95880, 95881, 95882, 95883, 95884, 
    95895, 95896, 95897, 95898, 95899, 
    95900, 95901, 95902, 95903, 95904, 
    95905, 95906, 95907, 95908, 95909, 
    95910, 95911, 95912, 95913, 95914, 
    95915, 95916, 95917, 95918, 95919, 
    95920, 95921, 95922, 95923, 95924, 
    95945, 95946, 97574, 97575, 97682, 
    97683, 97684, 97685, 97686, 97687, 
    97688, 97689, 97690, 97691, 97692, 
    97693, 97694, 97695, 97696, 97707, 
    97708, 97709, 97710, 97711, 97712, 
    98054, 98055, 98056, 98057, 98058, 
    98059, 98060, 98061, 98062, 98063, 
    98064, 98065, 98066, 98067, 98068, 
    98069, 98070, 98071, 98072, 98073
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00152

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 (94586,94587,94588,95830,95831,95869,95870,95871,95872,95873,95874,95875,95876,95877,95878,95879,95880,95881,95882,95883,95884,95895,95896,95897,95898,95899,95900,95901,95902,95903,95904,95905,95906,95907,95908,95909,95910,95911,95912,95913,95914,95915,95916,95917,95918,95919,95920,95921,95922,95923,95924,95945,95946,97574,97575,97682,97683,97684,97685,97686,97687,97688,97689,97690,97691,97692,97693,97694,97695,97696,97707,97708,97709,97710,97711,97712,98054,98055,98056,98057,98058,98059,98060,98061,98062,98063,98064,98065,98066,98067,98068,98069,98070,98071,98072,98073)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}