SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f3ff144d9ec99f0609ae6a4c5acf56600d3b1ff231c9288b07e30d3d154c3d7' 
  AND token = 'V4Js9xBiLz/93DQmVCQZ+Ybvrz35Ho2UgIq1Z6XInK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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