Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdd22174663d358b2bd23f1ecc195a300fdcc8e68779e8bee8138ecaa0454763' 
  AND token = '62H39HxtWgN8zkzeShd+mpRCEisFtVxExTjqpsSDhUA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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