Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18eae76cfd590add9fb17c75be2c0950dd020866aa3545a208b548c10efc0645' 
  AND token = 'mG4+H7PmzHE+BF/TFQTSM+A4Ti1DqeNh5BIJLfVgcJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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