Try this:
USE [msdb];
GO
SELECT 'SCHED_' + j.name
--UPDATE s
--SET s.name = 'SCHED_' + j.name
FROM [dbo].[sysjobschedules] AS js
INNER JOIN [dbo].[sysschedules] AS s ON s.schedule_id = js.schedule_id
INNER JOIN [dbo].[sysjobs] AS j ON j.job_id = js.job_id
WHERE j.name NOT IN ('NOT_MY_JOB_01', 'NOT_MY_JOB_02')
AND s.name NOT LIKE 'SCHED_%'
AND j.enabled = 1;