Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6cf7ea4341b5070de7318f70a914c494c6f854edcfbedf04e3b3e23bd41c0def' 
  AND token = 'GrbRsUZMAZKJmZUALGClgXvW6k+j1gziOjcC5LAHruU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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