Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e3b93630f0f3e51f5eb40e1107dbbf13ca534a4000829c820bb3761483153e3' 
  AND token = 'OS7WMNoQ2nFjmoj+zl4PasnqEQjaL7QYEw+kpZq+uBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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