Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8586b3b994a786e3e7af7cac2c06de5b1a6e2d149ae5323db5ef7743a3b9aff' 
  AND token = 'rkSAxaHgNfPLcRamt1Yqo23/RNdj/8N88sYXrru/g1c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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