Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c765f3db5b31038c3ca68dbb237031f02f78f21d4207fec1ce1128fd12f504cb' 
  AND token = 'XZASI8tI+uVhzlyW6kzve6BUVuZqkUPnw1R8rq2CJeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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