Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6988b0ab41b939473b36f6fcce5f9ac99f27c21cc9f8eb43c6362a2a08fb50b4' 
  AND token = 'pn+qRMi7cplJXd+2I7fgDNNbODNAIPUW5eXvwzfeF2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}