SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    1209, 1186, 114, 1810, 113, 1742, 1598, 
    1565, 1597, 1708, 1694, 1732, 1596, 
    1632, 79, 297, 1852, 1456, 653, 1465, 
    1494, 1620, 1619, 1457
  )

Query time 0.00121

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": 24,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (1209,1186,114,1810,113,1742,1598,1565,1597,1708,1694,1732,1596,1632,79,297,1852,1456,653,1465,1494,1620,1619,1457)"
    }
  }
}