SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0414057324b60b8773ee96c6b513730abc7979a059466dd2a24c0370df555db' 
  AND token = '4bjE3DTuTdTf/uFTFgEiG3sL2iSJEZdvJRjC4s60piM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

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