Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '322abcc808fa87d63abd07562b68a274bd4e397b5c4765390305369a539bcb46' 
  AND token = '0tamHOWonUD3donsI1330W0oRNTPfVhJcoORu6D0mS8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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