Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b38779cecf39dce554172210af7a8abe4d47c30145066d0354e28d70129e5203' 
  AND token = 'sKIHQvK5wz1UxGXqorl4bZR4GTtJrQ73W/p750+1U7E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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