Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db70489bd588e2295818f1fa33f8870e1f97fe822f5305d09c72bac8e9e15ab5' 
  AND token = '9i0CRvc6zqJ6QEsGaTNhZwNKeEwzKHEmFyKMgUHAcVA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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