Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b79341eb2bf6431bc3e2a95580fb490e41148f81fb437e64bd3b2a985a27154' 
  AND token = 'Ii3tFc7ilUgsfUzlQ6rfFnaL9RFFKK2jRA0IYllhrLo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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