Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10e9ff295e4f4b5f846f86c34e665a0310e3909025c33ebc8cbbce92852d81ab' 
  AND token = 'NfxOwakXAPlSS9HUntH5/fMSYppBUHoTrds9ztCcg84=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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