SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddeebbea15439e1c79051a2d46d5083bfcb56707e3aa8c245e027a39c5dc2997' 
  AND token = 'VFIr3Re+tTuqvjnQEx/2M6FXBBUjEdSFRuMDtqZXIL8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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