SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48b8c93e19b390a0da74cd9cc882dc45e4639b8329a68c8ce52555556fb58b21' 
  AND token = 'TeqwdmozdkQhR7OOsNsQ65GemaclOa+alvhervn6X4A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

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