Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31a2b42dfebc20bd3d271fce08e732e8822338dbd672e988eda736bc09f38f9c' 
  AND token = 'wvQSkIs1cJDXhBo8idWcj/PigGu+jrToiNCiwbMDesk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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