They are created now, and not from the beginning
Not that they were now done or brought into being, for as yet Cyrus was not born; though the raising of him up, and holding his right hand, and his executing the counsel of God, are spoken of as if they were already done, because of the certainty of them, ( Isaiah 45:1 Isaiah 45:12 ) ( 46:11 ) . Aben Ezra interprets "created" by "decreed"; though these were not now decreed by God; for no new decrees are made by him; but those which were made by him of old were now revealed and made manifest by prophecy, which is the sense of the phrase; so Kimchi observes,
``the time when they went out of the mouth of God is the time of their creation.''Thus in like manner the incarnation of Christ, his sufferings and death, and salvation by him, things decreed from eternity, are spoken of in this prophecy as if actually done, because of the clear manifestation and certainty of them: even before the day when thou heardest them not;