Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89069e6a9a011f47b7dc103e534b11745d520f196f3ca6c27deb284a50225254' 
  AND token = '/8sFS9PjZP1ChidW8FTx0pskjdB9S5PR32lTljIN/0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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