Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c783569a2b79706ce8023406a95a046f846d6e740ec2752c1914c90a0e76d17' 
  AND token = 'fdlHtAQeYTHnDbAN/91t8Sgiiq0DlgwWvRt9LMh8Tzg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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