Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c8120ffca56229ca1012d0c587824c4032ad507cb39a2f3af6c3eaab3d7d23e' 
  AND token = '/Ui0oklR7BZAWXZD/pu6PSgW/eMmqhnea5RCLUffick=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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