SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c1882487ae576fd51e82708f5e75b5a593ff0a19099c852d0043aea59771376' 
  AND token = 'kHlaYIEC4Vp/wk9x31KfCn+LALiP8gLo47wN9EB+YII=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

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