Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23f73ce3bcd4f5e8d19c637c3df594845e42c54dbff43570df5e0ee066d8191b' 
  AND token = 'ERiUqjevfI8k9De1yjRXX5JMlYsY/4yMIJNbV8ILRuw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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