Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '979f43e8940d78fdb0fec7788e685503b5e08f0758070126bc2444e79d036895' 
  AND token = '0TzP9x6rqYTelKo8ZuA95Em0o0XbNt8rMsKnZL6NvIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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