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 (
    92770, 92771, 92772, 92773, 92774, 92792, 
    92793, 92794, 92795, 92796, 92797, 
    92815, 92816, 92817, 92818, 92819, 
    92820, 92946, 92947, 92948, 92949, 
    92950, 92951, 92952, 92953, 92954, 
    92955, 92956, 92957, 92958, 92959, 
    92960, 92961, 92962, 92963, 92964, 
    92965, 92966, 92967, 92968, 92969, 
    92970, 92971, 92972, 92973, 92974, 
    92975, 92976, 92977, 92978, 92979, 
    92980, 92981, 92982, 92983, 92984, 
    92985, 92986, 92987, 92988, 92989, 
    92990, 92991, 92992, 92993, 92994, 
    92995, 92996, 92997, 92998, 92999, 
    93000, 93001, 94766, 94767, 94768, 
    94769, 94770, 94771, 94772, 94773, 
    94774, 94775, 94776, 94777, 94778, 
    94779, 94780, 94781, 94782, 94783, 
    94784, 94785, 94786, 94787, 94788
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00147

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 (92770,92771,92772,92773,92774,92792,92793,92794,92795,92796,92797,92815,92816,92817,92818,92819,92820,92946,92947,92948,92949,92950,92951,92952,92953,92954,92955,92956,92957,92958,92959,92960,92961,92962,92963,92964,92965,92966,92967,92968,92969,92970,92971,92972,92973,92974,92975,92976,92977,92978,92979,92980,92981,92982,92983,92984,92985,92986,92987,92988,92989,92990,92991,92992,92993,92994,92995,92996,92997,92998,92999,93000,93001,94766,94767,94768,94769,94770,94771,94772,94773,94774,94775,94776,94777,94778,94779,94780,94781,94782,94783,94784,94785,94786,94787,94788)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}