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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65679be7b488bfd57745210e2599b18afd9d49ce9b3e56835d9e9cdfe77cdcf1' 
  AND token = 'JwHZkQIZ5VvYMR91/ZWQFmuZCdQE8Fibv3k/EcXUl9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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