Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3368d2e902de93bd79fa5b6cbbcaa8ce1291f5ff6e9b228978cfd8bc83634b19' 
  AND token = '7DbbUhjp5oLftrhqRPGPghavrUVG+SF5c9ggtIWpY+o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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