Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '46e995d01e26f32d6de63e28e1880714b846a765d6ee475033c50bb111a3540c' 
  AND token = '4G6L3B42cJEE6YQq1L/zQFx7OWhqH7BSBPc6l2TEz3E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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