Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c6ddf13a7864737dfe232d5b59f409251868aec45be8b99e2c27f7ba311867d' 
  AND token = 'uUqKjK4UEh19v08g9BtRd9RlTpx2qjLek2xlIHMmqqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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