Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e94185f6bf3ba35c8c9c7d3b8af2ee5f70a711dff9f0267d469d70253d86242e' 
  AND token = 'xRr10FzXtqPWw3U+vQ9jDOOdIuCM0s/F/EiEtxgO2/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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