Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '116ad1c7ca45e4e4c1772a0d39e10913d6ab02b75babe31c636d20387dd5094a' 
  AND token = 'ftNKnl9F6cbMVsFOeVnBIoLS0tl9nNDg02I/W84jW0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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