SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebc213dd43fb7c79f16e21cff54ba0b610aa1c4f034d98e1e7339c3e8fc433cf' 
  AND token = 'ZkqfRcqqO+d8X+EPg/0BdFbGGIHhxxW6UyddupfLuTM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

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