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 (
    1958, 1959, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 
    1957, 1892, 1956, 1955, 1954, 1953, 
    1870, 1948, 1745, 1952, 1951, 1950, 
    1949, 1924, 1947, 1906, 1946, 1945, 
    1944, 1943, 1939, 1927, 1942, 1900, 
    1941, 1940, 1907, 1938, 1937, 1936, 
    1935, 1934, 1933, 1932, 1931, 1930
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00147

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": 48,
      "filtered": 100,
      "index_condition": "cscart_product_descriptions.product_id in (1958,1959,2,3,4,5,6,7,8,9,10,1,1957,1892,1956,1955,1954,1953,1870,1948,1745,1952,1951,1950,1949,1924,1947,1906,1946,1945,1944,1943,1939,1927,1942,1900,1941,1940,1907,1938,1937,1936,1935,1934,1933,1932,1931,1930) and cscart_product_descriptions.lang_code = 'en'"
    }
  }
}

Result

product_id short_description full_description meta_keywords meta_description search_words promo_text unit_name
1
2
3
4
5
6
7
8
9
10
1745
1870
1892
1900
1906
1907
1924
1927
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959