SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '549c3a455d0bc94ae40238b42f371aefe9632d5b64401d11203d687704d536ae' 
  AND token = '+g7T0Fh3ca3xXZBEy8h7F0H6CEyi0HKOW7dAz+Ocnkc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

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