SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    49682, 49547, 49130, 49124, 50045, 49015, 
    49800, 49759, 49737, 49734, 49736, 
    50195, 49209, 49662, 50303, 50134, 
    50135, 50300, 50316, 49785, 50297, 
    49937, 50299, 50298, 50278, 49214, 
    50235, 50218, 49788, 50287, 50305, 
    50286
  )

Query time 0.00173

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_products",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["product_id"],
          "rows": 32,
          "filtered": 100,
          "index_condition": "cscart_products.product_id in (49682,49547,49130,49124,50045,49015,49800,49759,49737,49734,49736,50195,49209,49662,50303,50134,50135,50300,50316,49785,50297,49937,50299,50298,50278,49214,50235,50218,49788,50287,50305,50286)"
        }
      }
    ]
  }
}