SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    1218, 1217, 1216, 1215, 1170, 1171, 1177, 
    1175, 1168, 1183, 1184, 1174
  )

Query time 0.00057

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 (1218,1217,1216,1215,1170,1171,1177,1175,1168,1183,1184,1174)"
    }
  }
}