Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb22a9e5b276ad4a6df719d4328678b9a6154e07b93610520d70679dd72a8a0d' 
  AND token = 'LanUW7YiUOLpXve26gyFIrzCja92JWHFQ6STzoOBe6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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