Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3454de35060f2b849f3747bd01103f58586373d8eca5dc76c41bb294dc281ce5' 
  AND token = 'jPoVmaalB9qLQOMOOcE/UxvjiF0mq2Q0cTa8SuQBU/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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