Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '698264ee4c77d56f52d5d73a6832b6401a98225b3480fa609abbf795ecd51e99' 
  AND token = '00osIO0aq7xHtlY740HaNY6TIPxe8kCW9rqbhs38kIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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