Full-back Lloyd scored a first-half hat-trick while wing Baker helped himself to three in the second as the Ironmen racked up a dozen tries to overpower Keys.
Lennon Greggains was at the double while former Ospreys and Wales international Sam Cross, back at the club after a season in the English Premiership with Newcastle Falcons, Ben Jones, Daf Land and Peter Richmond also got in on the act as they ran riot.
Jones sent over 10 conversions to complete a resounding win for Merthyr to end up with a match haul of 25 points.
Newbridge also made it back-to-back wins after they triumphed 28-15 at Llangennech. Josh Thomas’ brace and tries from Cian Jones and Luke Morgan secured maximum points for the visitors. Robbie Turley kicked a conversion and penalty with Eammon Rees also sending over a penalty.
Harrison Button and Kalum Evans scored the Llan tries, with Steff Marshall adding five points from the kicking tee.
Bonymaen are up and running after notching half-a-dozen tries in their 40-17 triumph over Newcastle Emlyn. Jordan Farley, Garan Williams, Olly Davis, Brandon Owens, Rhys Leonard and Gareth Andrew were all on the scoresheet, while Lawrence Thomas kicked five conversions.
Pontypridd, who had a bye on the opening weekend, launched their league campaign by coming from behind to defeat Bargoed, last season’s Championship East winners, 34-19 with a bonus point at Sardis Road.
Oli Shepherd, Joe Davies, captain Cally James and a penalty try were on the scoresheet for Pontypridd. Jacob Symes added three conversions and two penalties.
Tries from Logan Yendle and Ashley Norton, both converted by Josh Prosser, had given Bargoed a 14-0 lead. Rhys Stephens added a third Bargoed try in the closing stages.
“Obviously we’re pleased with the result, a bonus point win to start. But I thought we were quite poor for the first 20-30 minutes,” said Ponty skipper James.
“We didn’t really get going, but we had a bit of a purple patch in that last 10 minutes of the first half and then second half we controlled it a bit better I thought.
“Fair play to Bargoed, they came out and played and were physical, as we expected, but when they get going and perform how they can do they’ll be a real threat to the league as well.”
Elsewhere a hat-trick from right wing Dylan Scott inspired Cardiff Met to a 59-13 home victory over Ystrad Rhondda.
Henry Kirwan bagged a brace, while Josh Carrington, Alex Terry and Evan Sheldon also touched down for Met as they recorded their first win of the season. Steffan Crimp landed eight conversions and a penalty for a 19-point match haul.
Jordan Pritchard grabbed the visitors’ try, converted by Rhys Truelove – who also kicked two penalties.
Neath bounced back from their opening defeat by Merthyr to win 19-12 at Brecon with Jacob Blackmore among the try scorers for the Welsh All Blacks. Ryan Davies bagged a brace for Brecon, Jake Newman added a conversion.
