Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ede699cf45fee9e6cf2db33a4e63f6f37b73110b682de2de739f644532d9815e' 
  AND token = 'c6+/ad7CZnMHd6hhGiEwGGwmp+DRnj3G2zs0K65Tyr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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