Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1322f8d35b4b616e8b2ea9d865c4499df14e5a66b3cc5fc92f91675bc3aa909b' 
  AND token = 'lZh/N0HrUkAy5cn1boCepuf+sxaZ4P/UM87Ugj8jcf8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}