Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eab34edf73d00499a021c310da60cdba94a9ad2043d23b471824999cdd159490' 
  AND token = 'rqs2EX9VKTEQcQGKqUuYrmZw93tijX5SBDu+Gb/IcGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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