Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2052307f61598b7b5af231c2d98db0a68d84d90a8dd82e3d83acc9f10bf33d15' 
  AND token = 'wV68OhwSTdU1/c1GimUzYd8Zrtv0raioTgZGBBtGPx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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