Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f41e926be48030cc59e583b309e4c49c6dd518b9f913b290d2544be6a7a57935' 
  AND token = 'DibWjYs5XimfCNYeStMyg6rj9DIro7avuD2K68seQp4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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