Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '364ee2c45c81637be6684d03936205f332ef97425c9d8940ac036c1a7ca5d31d' 
  AND token = '0WUDOATvDsJfHgCxDiCehmoN77TMK5YA2JktemOLrY0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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