Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2313606a6ecde8cdad0f9ed64a684b18e6939e74314a12b0975090f998f6d7c9' 
  AND token = 'DO1cCkchwLjzShOPg35TCjoHTWPpgTrYtRzxvLmkuos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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