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 (
    96162, 96163, 96164, 96165, 96166, 96167, 
    96168, 96169, 96349, 97059, 97060, 
    97061, 97062, 97063, 97064, 97065, 
    97066, 97067, 97068, 97069, 97070, 
    97071, 97072, 97073, 97074, 97075, 
    97076, 97077, 97078, 97079, 97080, 
    97081, 97082, 97084, 97085, 97086, 
    97087, 97088, 97089, 97090, 97091, 
    97092, 97093, 97094, 97095, 97096, 
    97097, 97098, 97099, 97100, 97101, 
    97102, 97103, 97104, 97105, 97106, 
    97107, 97108, 97109, 97110, 97111, 
    97112, 97113, 97114, 97115, 97116, 
    97117, 97118, 97119, 97120, 97121, 
    97122, 97123, 97124, 97125, 97126, 
    97127, 97128, 97129, 97130, 97131, 
    97132, 97133, 97134, 97135, 97136, 
    97137, 97138, 97139, 97140, 97141, 
    97142, 97143, 97144, 97145, 97146
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00180

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 (96162,96163,96164,96165,96166,96167,96168,96169,96349,97059,97060,97061,97062,97063,97064,97065,97066,97067,97068,97069,97070,97071,97072,97073,97074,97075,97076,97077,97078,97079,97080,97081,97082,97084,97085,97086,97087,97088,97089,97090,97091,97092,97093,97094,97095,97096,97097,97098,97099,97100,97101,97102,97103,97104,97105,97106,97107,97108,97109,97110,97111,97112,97113,97114,97115,97116,97117,97118,97119,97120,97121,97122,97123,97124,97125,97126,97127,97128,97129,97130,97131,97132,97133,97134,97135,97136,97137,97138,97139,97140,97141,97142,97143,97144,97145,97146)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}