Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '982079a43e6509486bcfd9ee25e28440ca1da1be75709c54c5b1a88cc6562cff' 
  AND token = 'BOyt8ur9RyhtvB+EshdLDLn1jkM1vAScI2bIJlxH9pU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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