There are several churches close to Dromintee, ie Forkill, Killevy Upper & Killevy Lower. I searched all their records but did not find the marriage. There don’t appear to be any gaps in the records, so can’t offer any information.
There is an Owen Kelly listed in Griffiths Valuation for Cloghinny in 1864, having a one seventh share of plot 20, along with 6 other Kellys. (Modern Cloghinny Rd). He was also listed there in the tithes in 1828 so it may not be the same Owen who married Ann Hanlon as he was evidently an adult in 1828.
I looked for deaths for Lawrence & Esther Kelly but did not find either 1864 onwards. 1864 is when death registration started so if they died before that there may be no record of it.