Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '920da93357a194592f9531b81837ed877c9cd37ee372d14bbc5f8e8c467b8ccf' 
  AND token = 'KSO/b3BSakc3KGlDMCocr/YZI4xoTtitiD8/tRSJp9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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