SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd13a43ef15486a62684888e53505595d8798a128fce63196a9ebf0e77c4e137' 
  AND token = 'WCmYf/fMtXq0ri6TSqoVoGKvh+wFDeOmsr3ZxCUYmyU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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