Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03edd07493ee8310cd5b183722192e663766376e6b2d79f4b5f01445acb99b30' 
  AND token = '/oph2K0mB9911+T9DyR9jGtBfXoW7d3Wapm7v9V/7k4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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