Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '354d43f08a6edf25f40985cad948817028534aec5c8977d31fda99ce5d733bbb' 
  AND token = '9WJ+S3blmV9KqK0yXDO0M2/8JnP9TAETN5i7d8J4ABU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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