Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45653347d89edd165e06d76fd3b5bcfcdc15a5a88f089a5f5274581281fe924f' 
  AND token = '6pEMO1Wrbfk4cJbIrzA5r2B10n+yf3B35oemVZm5kBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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