SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    347, 346, 345, 344, 342, 341, 340, 339, 
    338, 335, 334, 333, 332, 331, 330, 321, 
    320, 319, 318, 317, 316, 315, 314, 313
  )

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_products",
          "access_type": "ALL",
          "possible_keys": ["PRIMARY"],
          "rows": 78,
          "filtered": 30.76922989,
          "attached_condition": "cscart_products.product_id in (347,346,345,344,342,341,340,339,338,335,334,333,332,331,330,321,320,319,318,317,316,315,314,313)"
        }
      }
    ]
  }
}