Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e2b69a5fb4a02f60f0c8e896be8b11f64afddbf120d6d9d3e2533801421781e' 
  AND token = 'NRTx10uL6THYdrDN96Pr07aNgitcsvAJKW5czzd0z/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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