Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '04feba70c1da55bac3d915d9510ef679efc8adc2b6619b70cc4cf1d08778a78d' 
  AND token = 'xgCuQeQ2lQPYPKW7x9wSWd4k+vWx7r7cQ0ptb5iuGlA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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