Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0333dc271d72933c25f0289216259492a2d61a54a33491d8fdb6d9c36a1ed2f4' 
  AND token = 'VIVzdLlLHHjWw7MlsdhMBd20bQc+MyLRvODG5F7wA6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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