Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '765d3bd7eb8f013a56623e040cdbef2e06f86f776dc5aa79a4bd4ab59304425e' 
  AND token = 'gZjoDje7MpNEkzuX1EpfeRH6m52VG5+ajeNT/0vmhKI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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