Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '591647626e1217a904ca68bef5574576220ce6da222a89a3efb0b126430109ac' 
  AND token = 'TrB6e+HwkWC2aRkYnGeWOgyfDo2o00sApcirl2Bm8RQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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