Not at the moment as the tokens are security sensitive, you may be able to check oout the db schema and see if you can find them in the database.
In The eLearning Community powered by Open LMS you can ask and answer questions and share your experience with others!
Sorry to reply to such an old thread but I happened across this while on the community site. I thought I would add this in for your benefit and other clients who may see this question.
You can use the Admin SQL located at <your site>/blocks/reports/view.php?courseid=1&action=dashboard with the following SQL query:
SELECT u.firstname, u.lastname, s.name13 AS "Service Name", t.token FROM mdl_external_tokens t JOIN mdl_external_services s ON s.id10 = t.externalserviceid JOIN mdl_user u on t.userid=u.id
You could make your own modifications to the SQL such as a 'WHERE t.userid=<insert your userid>' at the very end. Otherwise you could use the drop down at the bottom of the page to export to a CSV and use a program like Excel to filter the results manually.
Hope this helps!