Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae4b4a0fe6e95a2ef392cf4e1a8e6d84d32a9f9c56bf559e3e9f66435174cda8' 
  AND token = '1IPNLava5lYfxZZTBCoYMBLr8mmMNYHlMxvM2HGOJn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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