Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '7d5dd63171b193322ef8a5629487f47f1aa16382ea6917af74c3d878ea111ebf' 
  AND token = '/G01rjnIEJtcccxAfo+uA3NfTfb1Fbp60OhUDrSYE+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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