Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1a4cb823b48717e0d652d08bf4f71a3f421972332ddf48ffe5bdd0de8bbbd48' 
  AND token = 'sqp8yCECfqyW8rQQ5zLiH59k8Fb2QuaNzb/WOaoX/gU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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