Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d5ab2bad431f6c5a4b2e969d87fe36d72b8bfcac608b9636b4c51ca0f810295' 
  AND token = 'IjDzd6aWfsnOcLvctMLMisJES1X75G1LypG0iy3eGG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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