Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9b624ba58b5cc94536823ef5909c2a8f36a96f245101ff2eb3c92b4ecab38c4' 
  AND token = '1FsLlNbOPka7AStE0SNHBnU92uTa/XHskhWd6gg0Dr0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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