Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38ea01a6576ada0099ad6ee7315018bb979d323fc8f706478a23b1ff477eaaf3' 
  AND token = '1wZSmRXKZlBbB6cvaL8dZO6vEMxOKVX7X0jBr8BP0lU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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