Hey Ronaldo Aparecido,
Few points for you to consider:
1.) Never use * unless u have requirement of Complete table data which comes rarely.
2.) Check your where condition for primary indexes. create a secondary index if required. Use date directly in where clause (Already mentioned here)
3.) After all this, Try this as a Background job as suggested by Jelena.
4,) Can you explain why do u want to delete data from a configuration data table that may impact your system? Your query says GE Sy-datum which would only return todays data in your case?