Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76aea5fa6c99b532ff5f19db381137843ba699c7a5ba6db4442c98e4f600e178' 
  AND token = 'KrQAsUhQQFp+ROHltioeRa4+59kn5Nub88PUFT5U6fU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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