Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23a2cb683e453d4fbae4d01339c43c5bfa9838cda82eb936df1af01cd91cf49d' 
  AND token = 'ty45h0rhUZqYDO75XsSt3gIiASBTkasW2OBn0YrdSPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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