Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '974e9d161d3ac6d5b00edf67b42e67b72d1b96423e5e31ecf6baa27cd5c29d26' 
  AND token = 'GMi5MlbubLxBdQ0bz3igUXsBZGtM5b47QjpfZJW42vA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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