Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8202161ffeceb61581eb0e9dbdb8abb669c36a1cac058dfd06cce311622b7463' 
  AND token = 'dpMzJm/z0e1GZqi1ZNzIZoG5D7v1XFFdxxLn/WVGMFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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