SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9021344350fa9ddd189b308a993713129cb4754e81fa796ac7bb27853e7dd02c' 
  AND token = 'dnC8yDWjUzjP5r7RR2AtgDtUJAsnOb0EqKgA0AUBL+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

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