Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '546d1907a63d2cfff7b4cd08f7fa794714998e11c65a071a836ceb8f48a21358' 
  AND token = '2Pu3p2TB7qDETUcYrJqT3wl0lJdOzrDzwsaFhwOz5J0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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