Custom regex SSH match does not work

Hi am trying to match ssh keys using custom regex.

set -q @thumbs-regexp-5 '(ssh-rsa|ssh-dss|ecdsa-sha2-nistp256|ecdsa-sha2-nistp384|ecdsa-sha2-nistp521|ssh-ed25519)\s+[A-Za-z0-9+/]+[=]{0,3}(\s+.+)?'

But looks like there is a problem with current some other matcher probably will investigated further.
Maybe regex is wrong but test on https://regex101.com/ say its ok for rust.