SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1348f18ee33f5d19c9dd3300dffad1d6a82d35a013ba37bac5e24740e79af2fe' 
  AND token = 'GUOvhszB7LR9BgDPcogWyqygIzYzKard14MI1TH7/a8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

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