Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56e66b1fe36fe4c466ed0e8395116df7a79f9bb2066f63bb696642097700236d' 
  AND token = 'cK00eXWmX1EwgOZeRUUsNWNCIdIBjgjWIxI9y7mgmrE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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