Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a33cb10f0d9ea3f546a6addff8da290a61ec33e0a40bff7b5fd99290b5f60f7' 
  AND token = '/3wk4zixxlz9m6dL30aLpfmmq9bGJYT+o3LQAR1L6pQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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