Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c04edc3791a2826371f6e73885423702e67aa6aeb5a25fa006e7f9f4991e281b' 
  AND token = '34POmBGCP0OmsmlNxuDDxIDIvWK0C/6SfPE7ktRdIE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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