Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1c1fedd037f57db56338e7c335c3923ff0083714e0c751fbca725469ad4c58b' 
  AND token = '9HFxxJ5YxcyUlxdX7L2KciPb6pEVKf2HOloH4Q8Hobs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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