Keisala made her senior club debut at age 13 as the third goaltender and an occasional forward on the women's representative team of Lohjan Kisa-Veikot (LoKV) in the 2010–11 season of the Naisten SM-sarja (NSMs; renamed Naisten Liiga (NSML) in 2017).

[1][2] Ahead of the 2013–14 season, Keisala relocated 350 kilometres (220 mi) north of her hometown of Lohja to begin attending the Kuortaneen urheilulukio ('Kuortane Sports Academy').

She began her rookie season with Team Kuortane as third goaltender behind the 1A/1B duo of Eveliina Suonpää and Tiina Ranne and recorded a below-average .891 save percentage across eight games in the preliminaries.

[5][6][7] A series of injuries kept Keisala from being named to the national team for several years until she made her triumphant return to the world stage for the 2021 IIHF Women's World Championship, backstopping the team to a bronze medal and earning selection as Best Goaltender by the tournament directorate.

[8] As a member of the Finnish national under-18 ice hockey team, she participated in the IIHF Women's World U18 Championship in 2012 and 2013.