Using ScyllaDB, what is the most efficient way of referencing a user from a different table?

Question

Say, I have a table that looks something like this: (it's an example)

CREATE TABLE testing.friend_requests (
    sender_uuid text,
    receiver_uuid text
);

CREATE TABLE testing.users (
    uuid text
);

Here, I'm using the UUIDs of the users to reference them in the friend_request table. This means I would need to do something like SELECT * FROM testing.users WHERE uuid = sender_uuid OR uuid = receiver_uuid; (also an example) to get the user data of both users.

Could there be a better way for this using ScyllaDB? For example, is there a way to directly refer to the user row from a different table?

This is going to be used in a project which should be able to take millions of RPM/WPM (using a big cluster, among other things), so it would be appreciated if it were possible to reduce the database queries as much as possible.