Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3bc95565802c2010ba1ea1aef1c7b0ff762cfcc2f1d1ed0eca3cc268ead3cd7' 
  AND token = 'imUScPXt1Her8aGyuV4EVAzrU6QUbJzKwYx4peBxIEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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