documentclass{article}
usepackage{longtable}
usepackage{multirow}
usepackage{hhline}

begin{document}
vspace*{170mm}
begin{longtable}{|c|c|}
hline %same result

Mkay & Okay \ cline{1-2}
Mkay & Okay \ cline{1-2}
Mkay & Okay \ cline{1-2}
Mkay & here \ cline{1-2}%hhline{--}
Hmm & Okay \ cline{1-2}
end{longtable}
end{document}