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 (
    94417, 94418, 94419, 94420, 94421, 94422, 
    94423, 94424, 94425, 94426, 94427, 
    94429, 94430, 94431, 94432, 94433, 
    94434, 94439, 94440, 94441, 94854, 
    94855, 94856, 94857, 94858, 94859, 
    94860, 94861, 94862, 94863, 94864, 
    94865, 94866, 94867, 94868, 94869, 
    94870, 94871, 94872, 94873, 94874, 
    94875, 94876, 94877, 94878, 94879, 
    94880, 94881, 94882, 94883, 94884, 
    94885, 94886, 94887, 94888, 94889, 
    94890, 94891, 94892, 94893, 94894, 
    94895, 94896, 94897, 94898, 94899, 
    94900, 94901, 94902, 94903, 94904, 
    94905, 94906, 94907, 94908, 94909, 
    94910, 94911, 94912, 94913, 94914, 
    94915, 94916, 94917, 94918, 94919, 
    94920, 94921, 94922, 94923, 94924, 
    94925, 94926, 94927, 94928, 94929
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00199

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 (94417,94418,94419,94420,94421,94422,94423,94424,94425,94426,94427,94429,94430,94431,94432,94433,94434,94439,94440,94441,94854,94855,94856,94857,94858,94859,94860,94861,94862,94863,94864,94865,94866,94867,94868,94869,94870,94871,94872,94873,94874,94875,94876,94877,94878,94879,94880,94881,94882,94883,94884,94885,94886,94887,94888,94889,94890,94891,94892,94893,94894,94895,94896,94897,94898,94899,94900,94901,94902,94903,94904,94905,94906,94907,94908,94909,94910,94911,94912,94913,94914,94915,94916,94917,94918,94919,94920,94921,94922,94923,94924,94925,94926,94927,94928,94929)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}