Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f01b697b61ffdb9f76d8aedb74a0dc447683c7e96aec04fa1041b62bd59a151c' 
  AND token = 'mNGfTcSy27GWoMyUYvqZXS0yLVpywZhWOlrgAVDrVSU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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