Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ba88ef298be2ff22d6bc5f94e3c14c2e60567e186462b4b51ba938ddbb7e02e' 
  AND token = '1N+iFi/tsMrLPcVH8TBK68nowvovvR8ug4kQNfLpYhw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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