Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea33560af27801bb26a3c528be518f993d84848181fb210f74fee940542fee13' 
  AND token = 'lRYYz1gq1jwfQ/8jvA/866vlE8PQiDQuTsWYhSY6Wrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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