SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '022c1b3ef4d64940fe22ead67aa4625b250d8c00bf340e2537973382d32a5d6f' 
  AND token = 'TfGisVqCijnPjYdDZu1Uyy/V9Q//Vay53+VmpT8jrdY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

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