Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7b85e13400caeeb8f3ddd903aacc16e4d3f1e7fc4e4768f3b173b68dc7aeb6a' 
  AND token = '2QUNB3iv45bEVP5QoR3m3ea5Y8/9A7lo1MA+7Om+uKo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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