Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ac1f1cfa9a58f23fcf665584233792dcff7b2f0a337ae80f7ee511db168f39fe' 
  AND token = 'IhtJFbRxgWjOhnMEFjJo0YulElKtFNVVvaJY8conNIw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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