Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52de88c463dd35d2e314ba3672ecfb7942dbcab7be1e8c27aed26ea6486d4be9' 
  AND token = '0H67+J8PYLzXyyMTK4ONONriHUbaNqG/PfJj85H9+SI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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