Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9982bdd432b3891c72d31e5b0b91586aa36bf04398b31aa40266050ca8da08bb' 
  AND token = 'umhFzDjitBg/beXyaCGuwgy7+9QxbUN/BEFPFaA/pvI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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