Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '814bfaf5561330ebc7c41dc68ebef3dc37f287423557521c85062247a7205e8f' 
  AND token = 'a/y5SIxpxKbI6PXfLz35VMGiB2KTCYIurFfDTIqUQa0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}