鍵屋 is read as かぎや (kagiya) and means locksmith.
かぎや
kagiya
かぎ
key
へや
stable
いざかや
izakaya
さかや
liquor store
やどや
inn
ふどうさんや
real estate agent
くつや
shoe store
おおべや
large room
ひらや
bungalow
こめや
rice shop
あいべや
match between wrestlers from the same stable
ころしや
professional killer