Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c82d172186836be4fb4ebd4dc8ffeb8ac6d6f8961035f65e8bc91e60c33d8cb5' 
  AND token = '+N22pY/qzxd37AtSHxV5y1oHFScWohZnRMb9PkpDoRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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