SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2aeed45a74b5ffd06a8eea3148745241fe6c1f0fe507540e8ceee95fbc9cfd38' 
  AND token = 'IL7Z3sIF+IGm/Tgzd1CmZ6SdQGlmWnD4aFZ7XpTySS0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

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