Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7eeb725bde7620ed500b99a3ca9093b81315c5971f829f7be1b8d790c4fad02d' 
  AND token = '6oV+cXyuxshGWAR4fFPdcEkFOnHrKWThP9qPpsaHUX4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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