SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56e52bf4c2d5966544170dbb8ee5f460ee88d739052e4f5307960b81dfd069ce' 
  AND token = '00GFLvAHZ79RHGR3BCW9TD5+sraYLjJXReSAs0+claM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables