SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f86d32795523a2c2691b6b61da968ed56f23bfdf1a920dd299d7f276d86ea5b' 
  AND token = 'LI0sNBGS9MNGQdHJKpx+Cs4Igp25kzUl7Ik6Huv6HGE=' 
  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