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, 
  cscart_product_descriptions.unit_name 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    17, 148, 180, 187, 232, 230, 231, 18, 16, 
    4, 5, 23, 24, 170, 1, 22, 149, 227, 78, 
    79, 190, 189, 162, 159, 158, 245, 238, 
    239, 242, 243, 241, 240, 214, 217, 218, 
    207, 59, 58, 60, 199, 198, 94, 96, 201, 
    114, 192, 136, 130, 128, 126, 131, 177, 
    186, 185, 179, 11, 172, 134, 135, 195, 
    233, 168, 167, 169
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00135

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "89.81"
    },
    "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": 64,
      "rows_produced_per_join": 64,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "77.01",
        "eval_cost": "12.80",
        "prefix_cost": "89.81",
        "data_read_per_join": "292K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description",
        "unit_name"
      ],
      "attached_condition": "((`twebezli_Commercemodalpopup`.`cscart_product_descriptions`.`product_id` in (17,148,180,187,232,230,231,18,16,4,5,23,24,170,1,22,149,227,78,79,190,189,162,159,158,245,238,239,242,243,241,240,214,217,218,207,59,58,60,199,198,94,96,201,114,192,136,130,128,126,131,177,186,185,179,11,172,134,135,195,233,168,167,169)) and (`twebezli_Commercemodalpopup`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}