Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e66f5b7825f20a13465a1426dc66f56b441a5ae60b78ee79628d8e700234ffb' 
  AND token = 'UcEpuYEF0/Y5MYPw0wR1smY6PxQKUS8mWVeubQTo73c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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