Wow, you're pushing the limits of the records there. I don't have the record handy, but I did find a copy of 1 year's Christening & Burials Bishops Transcript in an Episcopal Will book around this time.
I also did put it into the LDS system, so it should be in the IGI. The record at that time just gave the name of the child, parents, & the date of Christening.

If you want to go farther, look into Wills, Land Records (Liber Assed & Liber Vast), & Court Records.
The problem here is that Episcopal Wills before 1660 are not indexed, & there seems to be no index to the Court & Land Records, except the Enquests after 1700.
Anyone know of other Court Indexes?