Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '710b50d2fcaebcdd7ceaebadbf3f62ec58bf3cc9402790fc3f89bdf091038cab' 
  AND token = '0rQLg/5Bm7j7b/KeOr+Mrawsbu7lYNn6wB2NbTJ7lh0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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