Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd49210126310f1af97d260b3ccc5af06d9ab8400d2cf51379fc682745b69747b' 
  AND token = 'h562LYYRWWup1xuyiKy/1OHjmDxkbgpkWbpVHsRC+bs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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