SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e6ba21e2dd5878d0a8a7f8ab996aa4309b174fc2d1a8369c9fe6e5d8c90d92c' 
  AND token = 'lKSroSDGCno5j2Id5UK/PR6aKaTseuh2350JiziHcjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

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