Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '418d03b7fcc2a49acf64da5eb01fc9cba2fa0cfb70f74c0e272519efd63f818b' 
  AND token = 'Dgf0rs2HBkt621BoPCcwhp4MVPugOffu5cDrJJRw6gY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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