Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3ae32a464b12773efd52eca639ed26d6fea0c155c35cc0a596bc8ad175ffef4' 
  AND token = 'TSvHZR7GNFeIE6N5uTNp4FtZ3MlqDlFLUiJByrElC5Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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