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 (
    94225, 94226, 94227, 94228, 94229, 94230, 
    94231, 94232, 94233, 94234, 94235, 
    94236, 94237, 94238, 94239, 94240, 
    94241, 94242, 94243, 94244, 94245, 
    94246, 94247, 94248, 94249, 94250, 
    94251, 94252, 94253, 94254, 94255, 
    94256, 94257, 94258, 94259, 94260, 
    94261, 94262, 94263, 94264, 94265, 
    94266, 94267, 94268, 94269, 94270, 
    94271, 94272
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00096

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "21.63"
    },
    "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": 48,
      "rows_produced_per_join": 48,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "16.83",
        "eval_cost": "4.80",
        "prefix_cost": "21.63",
        "data_read_per_join": "183K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (94225,94226,94227,94228,94229,94230,94231,94232,94233,94234,94235,94236,94237,94238,94239,94240,94241,94242,94243,94244,94245,94246,94247,94248,94249,94250,94251,94252,94253,94254,94255,94256,94257,94258,94259,94260,94261,94262,94263,94264,94265,94266,94267,94268,94269,94270,94271,94272)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}

Result

product_id short_description full_description
94225
94226
94227
94228
94229
94230
94231
94232
94233
94234
94235
94236
94237
94238
94239
94240
94241
94242
94243
94244
94245
94246
94247
94248
94249
94250
94251
94252
94253
94254
94255
94256
94257
94258
94259
94260
94261
94262
94263
94264
94265
94266
94267
94268
94269
94270
94271
94272