Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebc093da7faf01b525d960b30345513f7bdd0cebdd37643c8d10c3e0591f1ddf' 
  AND token = 'y29LD1OR0v/AxJtUoon1UvetyqyICu02couiz0u7wsw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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