Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bad8103031576f10ad644ceca2cc96887ed3f9b27e5c49ad6b5224fdb770edc7' 
  AND token = 'bMDqweiZIVlYb6RZx+H+v9k6iD2yqt6QEig7yR6HWn8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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