Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58b4f08ee81af615641551eb5a4f1b242a54a9be0b11f75947d37cb32ef38e71' 
  AND token = 'eqUtOywC9PtHgRUxsTawtnnyEVjT3pWtzmdWep0FgM4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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