Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b65bc639dba0cba360b9571349a0e4416e5788be65e7ce3f152f0e7d8c9d378d' 
  AND token = 'cQaRG5MeddxxAi8wxxKJKAtf/1VNfM7x/wO9KYNIVCw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}