Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9afdfc728165892e1a5b368da9887f6fc27b3461675694b31d4ad4907f59f7ee' 
  AND token = '9JmaVHCFstKBLZSTC1kUQSq6o3YpvS6cD0sWdHSmoaw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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