SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    1928, 1929, 1911, 1925, 1926, 1901, 1908, 
    1923, 1922, 1921, 1909, 1920
  )

Query time 0.00084

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_products",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 12,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (1928,1929,1911,1925,1926,1901,1908,1923,1922,1921,1909,1920)"
    }
  }
}