A speeding ticket for going 15 mph over the posted speed limit is a 3 point infraction in Kentucky while in Maryland it is only a 2 point offense. Kentucky and Maryland are both members of the Driver License Compact (DLC) and Non-Resident Violator Compact which means their DMVs share information and will take action against a person's driver's license in their home state if they do not take care of out of state moving violations.
The Driver's Handbook of MD states that convictions reported to the MD Motor Vehicle Administration (MVA) from other DLC member states will be treated the same as if the violation took place in Maryland. Points may or may not be transferable for out of state offenses though so check with the MVA to find out if points will be assigned for your ticket.
If you do not pay the KY ticket, Kentucky will likely send Maryland a non-compliance notice. When the MVA receives this they will send the driver a copy of the notice and a notice of suspension for MD. Your license will be suspended in both Kentucky and now your home state of MD unless you submit proof to the MVA that the ticket has been taken care of within a certain time period.