Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00b98821a9542c202dd47a71a79fc5db35de7a88b0e7612b036e872cb7ca9303' 
  AND token = 'qwb/1l0cMfGg2NphBw5twc0BqU3NtvOLYEEtOuDe1CU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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