Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1aedcd89346742fab8a6fe4e80c9f050cf69a7b4d167aef0975297eb7040ce1' 
  AND token = 'YKl4/0VEvf8zu6d0VoDvCVLW5Pf7rpbEM2xau4vtSVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}