Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d4246415cc19be655066d1b9ec883a979508986d5c5180494aea76a34818d71' 
  AND token = 'ClrMmq9B0N4wFSxVabIGmkrOJpF9DWxAVa/aQdH+nuY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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