Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79c1e3856e2b6bcc66c06dc7f58b407b392ce3e21ce8ffb4fb9b16d910693c80' 
  AND token = '1Mh2FFVVUbJXtXkwyNQcweu8QCe87ExcBVgahtb0rTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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