Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39824e610af690a91ba3d22203811c38ba1d39c0b01f0cd92977dac112cf5fad' 
  AND token = 'UjFa1kFNvnjv/88sQDQg5K37WiUCsKelGTQsZLE7Hp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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