Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6919ddc7031f55690e6c3065ed33d7c7a450c010fb5a9013fbbf5d3f0b76e9ad' 
  AND token = 'Byy5wdTVAbEPx1FsUnJeq+lZlCEGFs1yWWt81N7sVuE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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