Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ac64c66c7a230c203a275f757dcf87960f8ec423f11a2d64bb3f9b5c022fcb9' 
  AND token = 'FxsMxXH7en5pLQtHGnryYOdU+gkOkdngARg3xTMPTd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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