Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f79aa9f71851b03b84fc4765da7754c8495950a54fee58eddefa8b150effcbb2' 
  AND token = '3hHfHXu4PTXHQifq1xVn2VuTGp+m9YWNfyWQCYj3q2E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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