Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82cba98288221e86cfb4c8b406aef2b84609110ccc90da7159cef4adadf145da' 
  AND token = 'dkOiN9qX3KmdFF4vWwiaI4sFvjpxEFhgTD2YJXlLowg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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