Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '3a696594b3762fb41f29b8313af8de7a63f2f02c548923c8c6d7cbbf877a92da' 
  AND token = 'VR46/n7VtjA+r5mEcm9x0+j4wtDfJzaYkrOKb6HLctw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}