Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '428cdca114e3c083c23fe2ebf04113e8826f5080e0c138c3c027cbd8dbdbf08f' 
  AND token = 'j3Yah33OBVkc8iBuwpS48sTWZ0IQlfxQBY5Rqy3CVz4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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