Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf3b5c093cf115fc0a5fc5002d1bd497265dd0be664cff5580f01dd7e47fa45c' 
  AND token = '2y0UinRNypXjAsEUKRUQQJ1OOHLpi/+IHuWuu0IGUYI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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