Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc737a5d253df1530c564b4a0295c2789ce938aa3b2d4af0a8f736c5fc5c7852' 
  AND token = 'OlQelvGGYBMRuCOf4BXVADrI2TFuJfutDgzX3vilZG8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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