Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2af489dbe4bbf6b409eaac7b26a63355db6a8e214d2b73b9321faa6f8552abb0' 
  AND token = 'Bbudi+MWIKXBFH31/5+DDcqKclFQ/MKflVTi+m6AoA0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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