Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b54db8afdacacf8277919bcad4e474877cef970f700ba86da79d0b5850d59bad' 
  AND token = '7xzEVfWCj995Pb2DJl74Do6GgvGj5azuvyuULvbG4Ss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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