Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4e0011c0de1c7ae967818b0a7d790f72a9e9028fdb2cbd7225d1c97eaa95271' 
  AND token = '8p3iVE1oIwOsXppTR7B4yzht1rhJO4XDJvaWEzNaQfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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