Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5f1956b9ce175d3a0c8003746603e3f8aeaf04e3db5417a44da39e936c576e8' 
  AND token = '5aOSiv0V6XjcwSzoNOfUpGrYh5xBnnbXMImfC13Ka1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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