Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90c11a3fa93576890bd103bffd62684cd65768bb2ed2068dbce0749e31999fb7' 
  AND token = '0pRRu5TqBNkunXA3Ouu51IsDgAmQMTHxnUhlDeWNiJU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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