Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50ac18a04620ad9b82ac1d3448f65eab8a331139367e81479a75805d7f02f87e' 
  AND token = 'qvUZWOPaR71CEst2MlRe2JPGDSQ1dltxbddc4M07grA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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