Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05b1b4e79d481f2e5a0307015ac0c35a16c701d229b888f516bb3ea63a7886b8' 
  AND token = 'FsyNLrbqVQKMCdzKIYyVXjX8LN4mLWwmFdFBzpP9O74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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