SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb04cf56e78312e0d9d5b9684c734b27e3c91ec7714682d86c105820a11ea13b' 
  AND token = 'LjpZ2QRowYt0J+QxCxgRDPZVboIBh5NjdT7FCqMx/9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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