Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe0189ff2bcff78488c9cc5ca246685fbd9ad7089c022d5a8ffb8612ad504f1e' 
  AND token = 'cxHbmP/LeJKCO8U0Fu+i/SWn7GVV1PDylym4vOvZQPk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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