Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '358c84745e7a1d9c9499932eb8db1abb743331aead26de12cd39dec2e7ac4dd3' 
  AND token = 'YJNj05HbbLdVXmOKhFSJh+VOyCHqwxJ9v9fhec1jKJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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