SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69a895f5a2dc777c1c669810301ace1cc6be09f96bf781c4f9842361637d3607' 
  AND token = 'wwnsNWGDbopptWVm3h963Kes7ERN33j5O/aJVGrUGRE=' 
  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