Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4ecf75aaa4a3e7905f767f21c63f4b8387c65316a5db424adeb464a881d1acb' 
  AND token = 'bwbpDQTHM6zOXoh66+oHNonqgLRUHTsT69sbAH+HWPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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