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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55d9cee0cbc86f220a7297ed5d132a507ddd1661088856bd8b9a52a98df631aa' 
  AND token = 'GMW9BPwlj2KwQdgs0U7VpCMXjoErSD1b7ebeMWNljbI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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