Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50600fa6e06a71d466179e79811af29217c45f75f85e8b1495bdb99c055fd048' 
  AND token = 'bngAc9H+uEH3FQMH7AEEXo0VOeCnY9JN5Cq1ycu8fqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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