Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8892d7191a13d42ffc7d03bcea55c9efebbb2d4e5144730ee1c6284e0c3a9a1' 
  AND token = 'GnXSpxZCYUUhFl9M7WvibNzq4deafi6BR75yObbxavo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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