Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0bc7931ac7b703d4ee3e7d7179a472276a56175f72d79071190a09a692de453' 
  AND token = 'ar/v5X+eZo9XG2FRc8Dk283DjpN3zWHQeDMGME2uUTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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