Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e68659ce6ebd707946df93be7c83a315d7837711c5eab89a8a13c17d32cc049' 
  AND token = 'sEnzO1V5mBOhG1L2bwCzoInWqaGRzrDKQPNhTr3MOd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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