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 (
    93920, 93921, 93922, 93923, 93924, 93925, 
    93926, 93927, 93928, 93929, 93930, 
    93931, 93932, 93933, 93934, 93935, 
    93936, 93937, 93938, 93939, 93940, 
    93941, 93942, 93943, 93944, 93945, 
    93946, 93947, 93948, 93949, 93950, 
    93951, 93952, 93953, 93954, 93955, 
    93956, 93957, 93958, 93959, 93960, 
    93961, 93962, 93963, 93964, 93965, 
    93966, 93967, 93968, 93969, 93970, 
    93971, 93972, 93973, 93974, 93975, 
    93976, 93977, 93978, 93979, 93980, 
    93981, 93982, 93983, 93984, 93985, 
    93986, 93987, 93988, 93989, 93990, 
    93991, 93992, 93993, 93994, 93995, 
    93996, 93997, 93998, 93999, 94000, 
    94001, 94002, 94003, 94004, 94005, 
    94006, 94007, 94008, 94009, 94010, 
    94011, 94012, 94013, 94014, 94015
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00154

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 (93920,93921,93922,93923,93924,93925,93926,93927,93928,93929,93930,93931,93932,93933,93934,93935,93936,93937,93938,93939,93940,93941,93942,93943,93944,93945,93946,93947,93948,93949,93950,93951,93952,93953,93954,93955,93956,93957,93958,93959,93960,93961,93962,93963,93964,93965,93966,93967,93968,93969,93970,93971,93972,93973,93974,93975,93976,93977,93978,93979,93980,93981,93982,93983,93984,93985,93986,93987,93988,93989,93990,93991,93992,93993,93994,93995,93996,93997,93998,93999,94000,94001,94002,94003,94004,94005,94006,94007,94008,94009,94010,94011,94012,94013,94014,94015)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}