Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe76ed735486a87532dd4ba5930669acdda4615cfd7c103c4155024d94b827b1' 
  AND token = 'fqoFKeYDaIuzOa7A0ZTnN0lQLBDrC+rkWkGJETTcnNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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