Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5cf9b50b38719c21184a405bbb12b426f8a395ac18e44c9f37777290dfcf75a5' 
  AND token = '4rLhBVYMawcxkWNB4lA9xonRGNkVFi8j9SBY9l/7lHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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