Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c25bdc1fd4af335819cb124ea08fd08ef051182983ee9240d54ef9c1f62ea2e' 
  AND token = 'KbCrEQhkgNZ15hG9S+CS+V44GXztNzjR0cAs/SaUngg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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