Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '263682b6a7dd4c4ef68267799e5ba20ef0e153ff30dd1e46d85517d5e9fbaa01' 
  AND token = 'tlQdOXyginZgktUcUQEtdFZL3jDTdjCbadLfhKprsUc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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