SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    1375, 1429, 1436, 1069, 1435, 1097, 1104, 
    1109, 1373, 1410, 1431, 1433
  )

Query time 0.00069

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 (1375,1429,1436,1069,1435,1097,1104,1109,1373,1410,1431,1433)"
    }
  }
}