Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0620629cffb595513dce732abce2a44fc4d94eaee071abe025096a711fee82af' 
  AND token = 'V0zLg3ahaaWIhVTHxsNYcTKn+EFkH+qLXiq2wx0ZSnw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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