Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cd64d4f06e6b08d2a92b88d1674ef92d6111b7530bb219e3e42c78815d9dc6b' 
  AND token = 'lRxEo5t9DpPndqYNlbw0LRPVki/NMlRnuEACX69oW8E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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