SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f532a775850ec288a4ca3c4983f613369ce62dbfc8925dab9bb27fb35481a536' 
  AND token = 'vwmoXdZY6nDJf9BFsRFnWnviWMXTfeCk85MXND+lkx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

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