Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dfffd0c0f23903bb5a1085c9b6279f16b34873741c925da59f25d7e37cb417d' 
  AND token = 'v7/4uk8rDabH9DEn2qo2F1FjFIMJg/IJ7s5zSsJgruk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}