SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '629671bebbe50b18d6cc717f6a9e1de7045ec4158b275af1caa9f3cd9883f66d' 
  AND token = 'EtaOq24/2aN9cdpNJZxFClI1RuGsKNPxJGzSDwme5Hg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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