Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33943637ffd7396bb5b9dd535e8e410c1f0102fc92e40a79f5944d7792b2ab79' 
  AND token = 'L111IiLNgusJWCtcLzJT6rF9og85Y8VcetRb4e1alFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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