SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bbd972998f113d19c0d9b5659f8ba13f445ead4a0f3b66e6a4a5159e37dbadd' 
  AND token = 'xOYm0YJg1muo3lQ/MFkQbYkHUQgm+nwZtKZGojVE7QU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}