Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c910ec1ed9ace738081547b81749651fb52037c013dff1196dfa69fe4b7c6de' 
  AND token = 'kbdLCk7WopEG3Y8Dg0Zlpv2iGHYCv/fq9h7hv5Xg16U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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