Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '948cdaf6f50735e84db583d71667aa5abddc49636d75ed83e22046d2605e63f3' 
  AND token = 'ggeARFhb1xMYz3nvY+cnq0dHEg0AYx2pecVphqf1OeE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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