Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af2aca9b4b9487a5583532e3e789332cef2ef20cb171fb2ead18fdee8af3cf63' 
  AND token = 'O1YWsLlvPi3fMunn1vjL/gvgnSjod43zd6mnZSNS75A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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