Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f02dea48b46213e174719f7090dc1a6c4a7f57e0f8eb24fc307b6e6ec654f5f2' 
  AND token = 'INbGBkyOWNZngulQpXb5ttLfUGRCH21VBNKPuB7L/Y4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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