Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2695949c29417c27e6d5a3d0f7ae16bb6d0073d4ada2e265766e40c5c409e2d9' 
  AND token = 'hjTmBOUfeQpKsHFXxklTk0cT3IKMaDNxDwNlpgCfqJ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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