'bottimers' is a table for skill-related timers I believe, whereas 'botbuffs' is the actual buff data and is handled by Bot::SaveBuffs() and Bot::LoadBuffs() respectively.
Here's the load buffs query, it may not be correct:
Code:
std::string query = StringFormat("SELECT SpellId, CasterLevel, DurationFormula, TicsRemaining, PoisonCounters, DiseaseCounters, CurseCounters, CorruptionCounters, HitCount, MeleeRune, MagicRune, dot_rune, caston_x, Persistent, caston_y, caston_z, ExtraDIChance FROM botbuffs WHERE BotId = %u", GetBotID());