Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adcb3a417e7ff6acad8c713d5b7d5b815daee569c0cf42752fd55c33c37d180d' 
  AND token = 'anIHr6+5bhv5uZ7MXdbmYX0Oa6U1oQCc8nK1IhNMkC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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