SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e8235afe86c76f20d9c3961bf74f2874de3cf387c5dc5d383980960b55eafe69' 
  AND token = 'woRYYxVP/+liq3cHk7PUBzgT7Bc06qP/YlB0MQtFX0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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