Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd985ea558b6c3a0e34c5489eb370c647e334a8d7216771bc972f3639d99fea9d' 
  AND token = 'UZ1bWX3+PrSIKnJF9gALKh2RWsvf3ZOj6Frx9gocPyI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}