Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28a8bbe940c1a87c4b7fa89dad248529add905581f37b8b7ae195ef51f55f742' 
  AND token = 'O7HlQRQm7mU9soq4bbgPYwnuosY7T8vtb3IW7x6bdvY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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