Luckily I use btrfs and snapper to keep a few snapshots of my disc, and inside there I could recover the keyring, but I was still missing the password.
That done I worked, had lunch, came back to the keyboard and...
Typed my old password!
So I restored back my password in sync with the keyring, an my laptop was back fully operational!
I later realized that a copy of the backup key is stored in my online password manager too, but nonetheless, thanks #btrfs!
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