Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8df69f3928eee60b787a287ddae2f9f1382be60718e7bf62778d1c649e675eca' 
  AND token = '9xe6OKhCKAJghMEIlAR/Z39pwGxrL7LJBXoW9LbTFF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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