Does a will in Kentucky require to be notarized?

No. In Kentucky all that's required is that the will be signed in front of two witnesses who must also sign the will. When the will is filed for probate the court will need to contact the witnesses for verification.

It is much more efficient to have the will signed before a notary with a self-proving affidavit. The testator and the witnesses sign the affidavit and the will before the notary. At the time of death of the testator, the court will approve a will with a self proving affidavit with no further action necessary.