Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'e894f56f34bea26a776d4d39023e944253b3b938a41c50be7650ad6838ae6c84' 
  AND token = 'SsIkWd8dYGPX8jTS6LShYhDEXzdGcDRUzU90auN8LPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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