Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f45bdbb0e99e9110b592866aaabce323df04dec14181397398bc6ccb8be2ba9' 
  AND token = 'l+6zbW1rhvRzARLS5okvZpOB+EkIeulteTjlmQuuYHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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