Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f75782b947f42adb46b8d9bc3bbcf38e7a74c089facf2ccf43111f511d5b4b8' 
  AND token = '1NeRD+ElzVEpDIVysrjtEqZMqR3FnomFBtiO7iLcCOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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