Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b78c6c48037848230a28d6a8160fcc704cb64200ae8bcdcde0c9467c46abcda' 
  AND token = 'gQfB7igDnhtLGriZp/zMB25yINFcOrRMNLdARrdUcNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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