Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a24a45aa6ef695f9f3d49e5224423851b6ae0c8b2fab5e660c939838fcdb9499' 
  AND token = 'i/rPxX/iFiY+e5SJXQCOulst0uJiy6+qPQHxLJ+W1K4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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