Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'baa9b8fd7e2a1e6de552417781af252c86ead45d7b1d611dd3975ba1dd8bc7ab' 
  AND token = 'm6YjvCv5bjkO5nAeQj8uBJNpubDuhE0zHx/WAvSmRZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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