Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a932bdde0e360435312f6017631cf510a0103c862cd0d3b16378a870236bc5e2' 
  AND token = 'mLy2Fl9Zu+BobOdWshk2nS1hYQ9thgplEYckD/8ZFSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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