MariaDB 10.5

By using db<>fiddle, you agree to license everything you submit by Creative Commons CC0.

select version();

version()

10.5.17-MariaDB-1:10.5.17+maria~deb11

create table a_table ( normal_value text, secret_value blob)
insert into a_table values ('normal', 0x30e9bfa342cd1ff84cd50724f7b4617b)
select normal_value, aes_decrypt(secret_value, 'secret_key') from a_table

normal_value
aes_decrypt(secret_value, 'secret_key')

normal
0.123