Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bfc8f968bc5faa4652c75e5511fc3d41a856edd73b65bdce9c763843cf9087ae' 
  AND token = 'l49Jytai3pzfZlRkwqYLq0liY8CI5s4OqXlx7zO802k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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