Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03b327908ee2e1458b9f8ce72ad2e5a3969e31d95545cec1c5651705de35446c' 
  AND token = 'noXpXT29j/Z+JOukaCABFyzVkuIyQwXNwhB4xpRnrrM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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