Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29f10060d52d7bf1fd81b92c6b6a36a86959376b597590d4a0546a8325855212' 
  AND token = 'ZW617IWTrNt5R5mbQnKWp+qYH44p7imCImH9Fh8nhH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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