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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcb69af0b60d7ca5f082b4ce422feffcf63f16602afa364492f380cc09da1f7c' 
  AND token = 'wIqtwCF2ft9XcSHAa2quBkiJEf6rWpXCZAfcMYRZM+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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