Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '323234cd4f8b94eb21cc5f52f483916601beb8e290f5dfa7e0bb2b16e16798c4' 
  AND token = 'i1zWM40XwgEmOKLmn6k0lJIakY07DyVCqbwijkEkEig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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