Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '857864644221444a99e88a6cb96e57bbd2c117a6da229b2f0cdd930d306a3033' 
  AND token = 'vXdnaQG5S9ih8wHW2lLHyNLdQztEwlANE473yN1Y5g4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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