SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e3b37c2e8780653fbf3695bb18009c037f9b7ec3a732d92626c403a94e9213b1' 
  AND token = 'hQVKq267m75lY7n1PZP8KC7xlhYI51zlcDBOqRzuPPw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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