Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '752734e9defc240e7193e6236e808eb82a9f278d67e287fbfdfcf5c9482db81a' 
  AND token = 'wY9bMgpugiqMkk+6kL+CLdP8nMBapOEtKuUTeVpjKTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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