Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eca2a732ca6da47b768f3eb825d49a41c0d91e871b3e2f1043ffa980e8ff0b31' 
  AND token = 'YaMDI4F4rO4aT1pu5d+SBnffP7O5BLYR/5eIrWI1a0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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