Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7597228dbac502adbe603244634a13b7cdbbf976b485c0dfa7e9850aea5c3f54' 
  AND token = 'bc1fGgIG7JDXALZ4qD9yJAJkfmorArFHVqYg5Hgqwoo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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