Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c287f243f66a441d9df4ec82cf72a2c465aa2e79b09a39fe9f5c82ba13ffbdf0' 
  AND token = '0WvSpPNnxVuGY1OjNLb3c5n9jMvZuu3wgqFc6qq1RLI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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