Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afb2bd0990fdcfd25fead22a06f2c45ae9e2e87dd8842a860d6551cf7b2e41e8' 
  AND token = 'Y9qWih7d63C22vWKtT4rfC34YsHFJLV0fieCxdEdRMY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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