Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e79ef93d39c68a1bd18116a085ef316fccd6fce650c36c69bed01afaf8f2c70' 
  AND token = 'rFqa24vteM5oX/BzODclCOsPw33BI5J/y2zjoLh4VsY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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