Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60eaddcb92500db1eeb6be1357ad56ab38e2e78bdebf6a768580c7f7a5358f49' 
  AND token = 'o+l4KFZkd2ZFKCJxQEzUrZqSW7fKP8aPLkgCMbjbuY8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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