Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27a6673480086b7537c1adb925483eef7f621f0ce1c14d27a177cab7be832db2' 
  AND token = '6EZukAISmKEB/T1WKojbQSiE9oRuUt07W8fAD72cS6s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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