Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47f857673eab0f1e857e882879752b39a2b416a0e58182d2e723d8143cc14849' 
  AND token = 'GRxwTzLjhDzPBMvtvQ93kFFOB1Lk7snu8aN5sHrrkPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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