Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20525bcd69d8f29c89ea25d53ca56f74a32d00aea7ff76e36dcf349fa53923db' 
  AND token = '2PR2s0w9jhvP6Ow1EIzmQyJjASFt8wzj9JvTRdyrQgA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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