for that, try it like this. Set up the spawner as a triggered sequential spawner.

subgroup 1: IF/GETONCARRIED,,key1,deleted = false & GETONCARRIED,,key2,deleted = false & GETONCARRIED,,key2,deleted = false & GETONCARRIED,,key3,deleted = false & GETONCARRIED,,key4,deleted = false & GETONCARRIED,,key5,deleted = false/10

subgroup 1: GOTO/1

subgroup 10: GIVE/BigKey

subgroup 10: TAKEBYTYPE/key1

subgroup 10: TAKEBYTYPE/key2