Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9eabd05b5e0cfca0f6e618aefc112acb4719b48aecb3ebe1312c97a66cb8857' 
  AND token = 'nNzbnpISDYNZudVcQNdoC2TqdS3ouoQ9YDKhriY1PQI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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