Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddd8418cd6ed8888af766467f7a542554f0e4617277e4baf0d60ab3580a59595' 
  AND token = '1GqwIF9HKtzpZgWr83Iskj34CyjwlzdHn1+DOHd66OY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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