Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08b87f01a36fbdbdbf30019bc397e1dcfc2ef69f85d74e858235cfa23da63eb5' 
  AND token = 'frmh3TognOOexG3g/YGoU3XdqtkkYlezCZHd5miUPv4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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