Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '003dc88efcc47e6979a94531636ff5c8c6f9949184cf0234d18e295404c49c95' 
  AND token = 'DaFoO0kOqjmfpgHczUz2TF6gekWj9jSOFvNPhb7fT7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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