Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e9c81fda6d8f5ba92e44c464928953550a1370074dc22fa1bc5416219873642' 
  AND token = 'b7Tnuou8DUQoXo6jBAGZg28nzzj3bJjiAlMHJINJ7Ek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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