Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '46acb740ce14ea54e21937c48442ec0be9b5119dbc5a60aaf6cb1029cd5373c8' 
  AND token = 'oY8lpXmIPbZoyw+uNY9f8kOA50mNdO/xG+lRsy4NqCU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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