Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ebd880cc4b6eb9bba9a40d8f32fa734d3ec6fa4607ab4dfc6d424843ca630223' 
  AND token = '2JsKtnQWPVrM0QyaJc0TDo6MV74v8u/4lOEOlAt8XcY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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