Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe8e2d7b59ad6689d7eabdf4d7575d98e4dbbe24392370b66be9c6fa47bbbf9b' 
  AND token = '1OSuiudBJPBxYb0rImC6bm99Tk6mUNRYO1Nf6p9kvXo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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