Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83d7a3879d6a18101257c2a3737576251057cc8e44d3326253a1eacd955c749e' 
  AND token = 'uvq/eHcwSkUJUV23sn4rQUMTDbFdXsHF9fseFwQ+1eg=' 
  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"
    }
  }
}