Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f29d9b016d46ced4ea6400a18b2f09065c15942a61896dcc19298127489a6615' 
  AND token = 'tV2/EvxM792f8o6w9mgPDbLbnv05njv30WkZ8ScpAlQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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