Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '12af97910edb8038983a7b571ea2be8bcfc3bbefacfca3d8cc45bf501b241a13' 
  AND token = '1eZG0Ce5o1TdjLY0j8+XExJFTitRVxDCp2Gm5pmJIq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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