Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82e6f3499d0111c46206903c76c3b8f5c731db83956cfb35bc228e6102f64507' 
  AND token = '7IKcUjUPcLKxxA8kJ1K+rb8WAWrx5YsJwpRqFgiWRFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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