How to Open a Data Scheme URI from a Terminal in a Default Browser on a Mac

When opening a URI from a Mac terminal in a default browser, you can use the open command to:

$open http://example.com/

However, you cannot do the same with URIs that begin with data: .
I think I'm looking for it locally as a file.

$open data:text/plain; base64,SGVsbG8sIFdvcmxkIQ==
The file/Users/yuya/src/github.com/yuya-takeyama/qrcat/data:text/plain does not exist.
zsh:command not found:base64,SGVsbG8sIFdvcmxkIQ==

Is there any way to do this well?
I would like to open it in the default browser without specifying a specific browser.