Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e459fb8a2d3a529d7952fb20ecc9074b98c826ff8a789122a5c84a947b3b0ee' 
  AND token = 'QojnxiH7kUmeZ+B7z+yC/Ui5XkDuEngy6pSKHfba9TQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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