Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '964a9fc4bf368d262931685540f7a264b3195e0878bf2aa3fe2377e64af97cd7' 
  AND token = 'uQXSVbP6IA8EWnR7hCqCbNCHVa4CttSVYCuUwlEbjJc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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