Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e071dc81c8536a47331b3af25500aafaaca4834cee7baf5b23adf992813d77f' 
  AND token = '/OnUIOXN7Gm+PnVsZB2H75j9YBWcf/voGZQPe3uI05k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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