Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b64ca6b574e98ebed09a4c2e09ad24c8efd7d421c4ad86695e312255a3c467a' 
  AND token = 'cuNQMb2fmeybU976vuSl6XmeQcl87yZ8Tbg+E31v78I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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