Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c95c648967c5bdee8bba8b18bef65049054da3eadbd6fbe7b09722773797a3b8' 
  AND token = 'W85K+NSgr+nlvP1fYaQtY7ilaui9FuF3sWuadP8x5JQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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