Query: kms_keys_for_rds_db_instance

select
  rdb.kms_key_id as key_arn
from
  aws_rds_db_instance rdb
where
  rdb.arn = $1
  and kms_key_id is not null
  and account_id = split_part($1, ':', 5)
  and region = split_part($1, ':', 4);