Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bda1121b842134b5fa2028f9b45a52fc8876adeb851e5d6605cc5251bd36677' 
  AND token = 'AcR9ogkY1DXEM/+odJzEDxTbBOMuSlDonk3+5hIvlKg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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