Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '748b8b1dedbe3f134976832a8e59f40e55c26725684d7d8f101d4b7972e87f9f' 
  AND token = 'LBVwEkeziukhOqu9Z+6cEfYqtMsa7MZwRVf29sk/TDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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