it needs to be 56 or above at depth they are spawning. Are you sure your depth finder is reading the correct temps, have not heard those temps anywhere in Indiana yet, I guess maybe you could in a cove with really shallow water. As said above when water is high Crappie have alot more places to spawn especially back in trees/brush etc can be harder to locate at times..
Next weeks 70 deg weather days should warm the water up a lot might see some fish moving up shallow then.