Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f23ac2990e8398cf53247f80bf0f1f0808622cc853df07876533b20ea2763ef' 
  AND token = 'MfODFoA8WT0FEzEeH1NUs+K2wLg5L5Ov6318p2TfLhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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