Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1291eb2828ff467f555aa94900f26c37aed45de54a60bb1482b5866d6b141bbc' 
  AND token = 'gg/74kuUc7RT7au8i7ny5R5Ono+FvscrreJlAVJS2EA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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