Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e4d4160703656ff793b624ad12d4f6bd9c167579867497a8831d6816cc00e1c' 
  AND token = 'PmkT9eIWHH8PD5herWKoUoQGWGXyHVk8cbEthGnit3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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