Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '86573f9bda09e4dfce7da3aa795c8e112ed46dda5c3fd5f24fdc36a762fa81da' 
  AND token = '65cdzaY+G/WSGLdO1681MQ5hj0G5ARibUhSofXv+++U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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