Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f4ab9b8f39214382bbb33b8a9672ffe707ee356543427bba412cdd96f1e2d91' 
  AND token = 'thIvDT2IbS/3dafRCbMVTWyLnjrKxd2oJKwPUP4+H4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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