Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c92649329b4e69c1debd786749cc74f11723a38f99089f0e1920ba56b8408a7d' 
  AND token = 'tnh/kDD1D20v7luQnJpU7gbTIn5jP62RNMPkZQOxqmA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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