SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '082aad08109de2806d04b1f39b9eabbaefe64fcd4acc655871ca42056563b6bb' 
  AND token = 'twZL/c9pfMJYz3jsYPWxrZvGLh8FLKdBAeTSxBDBSMQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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