SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    1068, 1069, 1070, 1071, 1072, 1073, 1074, 
    1075, 1076, 1077, 1078, 1079
  )

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 (1068,1069,1070,1071,1072,1073,1074,1075,1076,1077,1078,1079)"
    }
  }
}