Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52058f7cafe94e23a2dd992bbb5903ca0b5bf49c030015dc5aa07f6b62c177ee' 
  AND token = 'jyjsQ0oDEkf+5W4bGNL+kShAdv4dskw2VSrskouYZag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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