Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ace34878473e56e34b89c933d6e0266e91f9296360ad881d12bb8b631c30593' 
  AND token = 'WX2U4SWuRnBPyM9ofJOQm6+Ve6E9ozmiaWKFIzI/r3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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