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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60341ccdb580fb23d1b1c4f44b86eabbd3dca0bee57164c7e89479fbb9b716e0' 
  AND token = 'BibAVuJ1YEP4QY7r191mKv3qoGh0WZ5Whtg9fIdBtuU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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