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.meta_keywords, 
  cscart_product_descriptions.meta_description, 
  cscart_product_descriptions.search_words, 
  cscart_product_descriptions.promo_text, 
  cscart_product_descriptions.unit_name 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    1943, 1901, 1200, 1212, 1939, 1211, 1568, 
    1535, 1566, 1567, 1032, 1470, 1573, 
    1917, 1916, 1491, 1496, 1497, 1498, 
    1570, 1571, 1572, 1347, 665, 581, 299, 
    301, 1799, 1462, 1549, 1521, 1519, 1517, 
    1522, 1523, 1518, 1516, 1520, 30, 31, 
    1545, 1180, 1204, 1205
  ) 
  AND cscart_product_descriptions.lang_code = 'vi'

Query time 0.00158

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": ["PRIMARY", "product_id"],
      "key": "PRIMARY",
      "key_length": "9",
      "used_key_parts": ["product_id", "lang_code"],
      "rows": 44,
      "filtered": 100,
      "index_condition": "cscart_product_descriptions.product_id in (1943,1901,1200,1212,1939,1211,1568,1535,1566,1567,1032,1470,1573,1917,1916,1491,1496,1497,1498,1570,1571,1572,1347,665,581,299,301,1799,1462,1549,1521,1519,1517,1522,1523,1518,1516,1520,30,31,1545,1180,1204,1205) and cscart_product_descriptions.lang_code = 'vi'"
    }
  }
}

Result

product_id short_description full_description meta_keywords meta_description search_words promo_text unit_name
30
31
299
301
581
665
1032
1180
1200
1204
1205
1211
1212
1347
1462
1470
1491
1496
1497
1498
1516
1517
1518
1519
1520
1521
1522
1523
1535
1545
1549
1566
1567
1568
1570
1571
1572
1573
1799
1901
1916
1917
1939
1943