SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c80c58266fb62178e23251338172f8810eaa7c2eea6e58a745437ba22f30872' 
  AND token = 'n1o4lBeVpuQ+hYtIjxfDhQrt9VsGrEzKJfnVJ/uRyQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}