Advice on lost wallet?

I have a Yoroi wallet. I’m an idiot and lost the recovery phrase and spending password. I have an old private key saved that I’m wondering may be for said wallet, but now I am stuck. How to confirm it’s for my wallet and not some silly test thing I saved or a different private key somehow? And then, Yoroi doesn’t have a place to put private key. How to get funds out assuming it’s indeed the right wallet key? Advice appreciated.