Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8168620f76e2f7aa50b5f3ea720f645642b32a91eb41ff330b43a02d40053385' 
  AND token = 'AQ6tl6QgUZH9aWaRdo0m/fEkDYta6RpaA79PorXe2+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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