Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76c9e6712ed2f2860eb5022d558c41d29f28e79275bff3c7a2e262760e24b16b' 
  AND token = 'Y9wFzH9sXEK6mwyo31PRywIAtFBC7kUZXNjCQvkdwEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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