SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01d82d5b31a67a09a759ad62c884b6e5120a431b570f19cbfc47561629e253c8' 
  AND token = 'SnAtsXBuCa4bHvWMLQ9pcxYd9njd9FrYTlp/I2PuaMY=' 
  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