Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f14cde40f992eb27568b4e5abdda9add1b2d7260abebc4fe90900aa0cc5b91f' 
  AND token = 'sSdFgKYKf+QIAL7fOaDp1csx0qvUNA4bVCkUaIh6+w8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00079

JSON explain

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