The explain analyzer at https://mariadb.org/explain_analyzer allows the user to tick a checkbox to "Save Explain for analysis and sharing". Doing so redirects the user to https://mariadb.org/ea/<TOKEN> which returns a 404 page not found. However, modifying the URL to read https://mariadb.org/explain_analyzer/analyze/<TOKEN> the saved analysis can be retrieved and shared with.
Lastly, when visiting the saved analysis via the modified URL an success-alert is being displayed, again with the wrong URL to the analysis:

Ironically, the text of the link points to https://example.com