Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbbcd245f3df210f7a7fd57ddf0f8d697e4b4318bef832a956ac8654a3a626ce' 
  AND token = 'FnaErJu5RikLVh0k/0yZXCsxbi8XSaeGLcNwVJ3bkOI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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