Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5f1eed213e4d277442de4ab89c6de7120b87a0aefe9a71f74c803ff63248204' 
  AND token = 'fWoUXzVrZl2c5qImgOnkZTK3gICFM7/5adTIICQ13FQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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