SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '122dc7097779be86a5aea64150cd49388645a542e00e055450561ab32671f07a' 
  AND token = '9HlILSf3KoIZ696XsJwwQxZuiOZx3b7PJDQ+NFOxWFI=' 
  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