Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a07161b9224c47ef48480425bd042ea6f5b4dfc3c632fb3908e52f59e834c26' 
  AND token = 'QCVCnFBCcUnCJ+DTNe4w8o0cahf8t7PJzqp4CvzNnMc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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