Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83d6df7c314b68b9491a06807e8f6b64604b6066e078b089212c3ddf72b1d8b9' 
  AND token = 'RiLIx8jZAJOskZhmyHvK1ydI6G/mozBxQfzG8HuRcac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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