Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '818337a3ecf8e9c99bd0442a75548892b73c47214f2f6897280253b106d0ded2' 
  AND token = 'Z6DJbxvx2DhS3ijr2QY4aGr9isx2kF/oZqxutBddk94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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