Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2384dc45b4502642cc8805d8a7c28cbdf191988be8204d785904f02786255cc' 
  AND token = 'ZrWSZ5632aDJdjV9AcsCLam/8hGI1hJ/XfMaFnnBhFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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