Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f40be54ea1dfd998151647638e6229649d7ca387d04a8962935914435e93816b' 
  AND token = 'BOMaI0aq6LBBUsmqo4do5D+J8kxrNWKei5jt+4YMOyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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