Databricks actually has pretty good secrets management.  If you need to secure a key, do this: https://learn.microsoft.com/en-us/azure/databricks/security/secrets/

To use the key in your SQL statements, do this: https://learn.microsoft.com/en-us/azure/databricks/sql/language-manual/functions/secret

You can also move the decryption to a UDF (either Python or SQL) and call that in your view, which would also keep the encryption algorithm name away from prying eyes.