Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb0d9df8c40b02ec9b9adb7d34ac860e56d20a74d731326ee7f385f0969440b4' 
  AND token = 'iZPKl6GZVlqlDh6AFXZU78PfE9zX/WEYclFUnYF17P0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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