Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04fd4bc4ea722176f5fdeb43c923a032c0c5a34cc4d635b27d6f800eec9037a4' 
  AND token = 'mB1+34H88/4vEfgn3NbS89rucDDpxUgjco//bQx4RSU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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