Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3cb9a01999f64990da4ee2e7fd6265390f7c09a5dc50011e4d905196235fc8b' 
  AND token = 'VRiBYTmuIxwmduSimMTQJSrA7pxAE85w7gLo8UMjkQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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