Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6d4bbb53b27b9a328a70ceb9c0dd41282cf794487f02fdc11a7f760404705f3' 
  AND token = 'pf++Hw7AQNzFi0GdmriYb4QbLnGJaXrPxX6BYY4cr7I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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