Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a078f66b73006cf3bb72be7e764dd3179eee88e8caa31424152f858f5b7bd789' 
  AND token = 'x3FusNBeEjTC0h1CnI3p7WagtfLS5Yl8MDf+Kth4A9g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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