Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f267aea8ca48f9f66d0cb5879d86a36adb35ddd109c4d86f682fa994c8481d7d' 
  AND token = 'xcdR8BZqL33z+OTVt+LvFgZ4w+0rZelu83du+0vD1as=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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