Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54c422ca5f01838278fabccc24b1f258b783baa7d78622cdab6622248bea726b' 
  AND token = '6/k0CW701rV8IiHzaFz8sZ0xXg3g8eYO645PII6T2bU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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