Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a92f53476ad36953940b903cb16ce1f2178ab90ab7a352acc1611f2655b0dd90' 
  AND token = 'cWRQdPPov0T8knm4Jg8bRCz+uuOa//RnJJ6zKmcP8Ww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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